Automatic doors, a 2,000-year-old invention

Several years ago, I happened to visit the plantation of former President Thomas Jefferson in Monticello, Virginia, USA. His estate which was completed in 1809 boosted on having a set of automatic doors inside the parlor. I found this a fascinating feature since I assumed this kind of automation was only born in the second half of the 20^th century. Well, I was wrong. 

Hero, a Greek engineer and mathematician from the 1^st century AD is the oldest known - or documented - inventor of the automatic door. The working principle is simple and must have amazed those who witnessed how the temple doors would open ‘spontaneously’ after the prayers of the priest.

We keep forgetting the huge amount of knowledge that was circulating in antiquity. Most of the great minds performed in many fields. They were philosophers, astronomers, mathematicians, architects, engineers, geographers, poets, etc. (see: Greek philosophers Alexander knew).

What a wondrous world!

The roaring times of the Antigonid dynasty

The Wars of the Diadochi broke out after Alexander’s death in 323 BC and his huge Empire went to “the strongest” as he may have intended to say on his deathbed in Babylon. However, it did not go to one single ruler as none of his generals had his vision or charisma. 

After endless battles, intermarriages, and lots of intrigues, Alexander’s generals eliminated each other and, in the end, started four distinct dynasties. Ptolemy initiated the Ptolemaic dynasty in Egypt, and Seleucos the Seleucid dynasty in Asia. Cassander, the son of Antipater, founded the Antipatrid dynasty (the ancient Kingdom of Macedonia). In 306 BC, Antigonus Monophthalmus (the One-Eyed) declared himself and his son Demetrios kings. By doing so, the Antigonid dynasty replaced the Antipatrid dynasty. 

Antigonus may well have served under Philip II and lost an eye during the Siege of Perinthus in 340 BC. He later joined Alexander on his Persian campaign and was promoted to satrap of Phrygia in 334 BC. His main duty was to maintain Alexander’s line of communication and supply. As a result of the Partition of Babylon following Alexander’s death, he also received Pamphylia and Lycia. 

During the Wars of the Diadochi, Antigonus picked up momentum and managed to rule over all of Asia Minor, Greece, Syria, Phoenicia, and northern Mesopotamia. Fearing his increasing power, Seleucos, Ptolemy, Lysimachos, and Cassander joined forces against him. Antigonus was defeated and killed at the Battle of Ipsus in 301 BC after which his realm was split between Lysimachos and Seleucos. 

However, Antigonus’ son Demetrios Poliorcetes, by now having earned his stripes as Besieger survived said battle and took control of Macedonia in 294 BC. Cassander died in 297 BC without a successor as his sons had eliminated each other, paving the way for Demetrios to become King of Macedonia. Not for long because in 288 BC he was driven out by Pyrrhus and Lysimachos, and died as a prisoner of Seleucos. 

It was not until 277 BC that Demetrios’ son, Antigonus II Gonatas, regained the title of King of Macedonia. He ruled till about 239 BC to be succeeded by Demetrios II Aetolicus followed by Antigonus III Doson ten years later. 

Meanwhile, Rome became the rising power in the eastern Mediterranean and soon the first conflicts with Antigonid Macedonia led by King Philip V (221-179 BC) erupted. His successor, Perseus, put up a fierce resistance against the expanding Roman Empire that coveted Macedonia’s wealth. The Romans conquered Antigonid Macedonia in 168 BC at the Battle of Pydna, turning Alexander’s homeland into a mere Roman Province. 

Although very eventful, the Antigonid dynasty was short-lived and lasted less than 150 years. 

Macedonia’s grand palaces of Aegae, Pella, Bylazora, and Dimitrias were thoroughly looted and the houses of the wealthy Macedonians were plundered. Statues, paintings, jewelry, and other wonderful precious artifacts from Greece and Asia were up for grabs. Roman generals and common soldiers alike took as much as they could carry. Only the gods know what happened to the collection of Macedonia’s precious libraries.

Surprising city of Tripolis in Turkey

Tripolis can be found some 20 kilometers from the famous site of Pamukkale and the ancient city of Hierapolis. Its name meaning three cities is due to its location, i.e., at the crossroads of Phrygia, Lydia, and Caria, on the northern bank of the Meander River. From here, it was a convenient hub to reach Sardes, Philadelphia (modern Alaşehir), and Laodicea. 

Although Tripolis existed in Hellenistic times, it reached its peak in the 2^nd century AD as testified by the remains we find here today. 

The city could be entered by two gates, the Gate of Hierapolis on the southern side and the Gate of Philadelphia at the western end.

[Picture from Female Fearless Travels]

Excavations have exposed a straight colonnaded street of ten meters wide and 450 meters long that runs east-west through the city. It was paved with travertine slabs. At the intersection of the main streets, a Nymphaeum was discovered. This Orpheus Fountain rested on a marble floor, and its walls were covered with onyx and white marble. The water came from a cistern east of the street. 

The colonnaded street is the most prominent element in Tripolis and is for now the main attraction. Pending further digs, several monuments from the 2^nd century AD have been identified, such as two Agoras, one of which borders the northern side of the street, and two Baths, the Great Thermae near the western entrance to the city, and the Theater Thermae close to the theater. The theater is estimated to seat 8,000 people. Also, the Stadium could be located just outside the city walls and measures 256x66 meters. The Bouleuterion of 64x44 meters stands in the center of Tripolis, and only part of its walls are visible. 

[Orpheus Fountain from Turkish Archeo News]

It is remarkable, however, to discover an indoor bazaar in excellent condition since it remained buried for centuries. This structure is a unique example so far in the Mediterranean. 

The fate of Tripolis was sealed after repeated earthquakes, the most severe one happening in 494 AD.  

A visit to Tripolis sounds rather inviting. The colonnaded street is very promising, but sadly little is known of the city’s role in history despite its early origin dating to the 4^th millennium BC.

With a population of nearly 20,000 in the 2^nd century AD, I assume an emperor like Hadrian would be mentioned as he stayed in nearby Hierapolis in 129 AD. This also applies to Caracalla in 215 AD. I would not be surprised if during Hellenistic times members of the Seleucid dynasty spent time in Tripolis. Apparently, nothing of the kind has transpired from the excavations yet. It is like visiting a skeleton without a soul …

Plato and Atlantis

Plato wrote 35 Dialogues but two of his late Dialogues, “Timaeus” and “Critias”, are quite unique as they relate the history of Egypt to around 9,000 years before his time! That is where and when Atlantis is mentioned. Timaeus was a philosopher and astronomer from Locris in southern Italy, and Critias was an Athenian politician. 

Atlantis is, was, and will be very controversial. Yet, Plato’s tale is all we have to go by. As in every story or legend, there is always a base for some truth. To bring the Athenians in contact with Atlantis sounds far searched, but there is hope for the skeptics. 

In February 2022, Sotirios Sofias of the National Technical University of Athens published a very revealing study on the matter under the title “Atlantis: A real continent and not fiction according to the dialogues Timaeus and Critias of Plato”, which I will try to summarize hereafter. The author has analyzed the original ancient Greek text as recorded by Plato to match it with Google Earth's screenshots - with surprising results. Please remember that Plato was a pupil of Socrates (see: Plato, more than a philosopher). 

Critias, during a meeting with Socrates, Timaeus, and Hermocrates (general of Syracuse), describes the visit of Solon of Athens to Egyptian priests around 600 BC. On this occasion, the priests honored Athens in all its glory including the city’s victory over the people of Atlantis. The Atlanteans, they continued, lived on an island beyond the Pillars of Heracles and had conquered all the islands of the Atlantic Ocean and many others in the Mediterranean Sea, including Egypt. Yet, all the countries revolted against the aggressive Atlanteans, led by the Athenians, who were victorious. Atlantis suddenly disappeared after a terrible natural catastrophe. 

Modern technology shed a new perspective on Atlantis when in 2009 Google Earth revealed the outlines of a submerged formation about 600 kilometers northwest of the Canary Islands. The main feature appears as a manmade grid, which matches Solon’s “square” or “plain”,  the capital Atlantis as recorded by Plato.

Studying these images, Sotirios Sofias found that all the measurements of Atlantis noted by Plato are consistent with those visible in the Google Earth pictures. The stunning underwater square, whose sides are 140 kilometers long, is divided by channels following a perfectly recognizable Hippodamian plan. The water from the surrounding mountains flowed through the city’s canals to serve its needs in fresh water and as a transportation system for the Atlanteans. 

This city and the island of Atlantis disappeared after a severe cataclysm, destroying Athens at the same time, and the city's glory was forgotten. The large island of Atlantis sank to the bottom of the Atlantic Ocean, five kilometers deep! 

After an in-depth study of Plato’s text, Sotirios Sofias established that Atlantis was sitting on a super volcano similar to Yellowstone National Park in the US including the same kind of hot springs and therapeutic sources. Both sites have more in common than one would imagine as Critias describes a landscape resembling modern Yellowstone's beauty. He praises the fertile soil of Atlantis with its abundance of trees, fruit plants, and the variety of tamed and wild animals that populated the island! The island was also known for its minerals like gold, silver, copper, tin, etc. The inhabitants of Atlantis did not know they lived on top of a volcano, very much as the people of Pompeii did not know that the mountain on their horizon was a volcano.

The global cataclysm mentioned by Critias was, in fact, the eruption of this supervolcano in combination with the violent rotation of the earth's axis. Plato attributes this event to a meteorite or comet (which he calls Phaethon) that hit the earth. It caused the destruction of Atlantis, Athens, and all the nearby coastal cities and islands. The Egyptian priests told Solon that their country was saved thanks to the Nile. This is how the ancient texts of Atlantis were spared for 9000 years! Solon’s notes on Atlantis survived and were passed on to Plato via his uncle Critias. 

Plato clearly mentioned that the city was protected on the North side by high mountains. Google Earth has indeed located three submerged mountains of 4,000-4,500 meters that have moved 75 degrees counter-clockwise after these violent forces of nature occurred, erasing the island from view and memory. 

Another controversial subject is the shape and size of Atlantis. Solon mentioned that the island was narrow and extended from the coast of Spain to the present-day Antilles. It included islands like the Azores, which are the mountain peaks of the submerged Atlantis mentioned above. Critias provides details stating that the island's eastern end was opposite the Pillars of Heracles (Gibraltar), at Gadiriki (modern Cadis in Spain).  At the opposite end, it almost automatically takes us to the Lesser and Greater Caribbean Antilles and the Americas. 

Based on the measurements of Critias as compared to the geographic layout of Google Earth, Atlantis had an elongated shape like a banana. It was 4,500 kilometers long and 760 kilometers wide in its center. The western end of the island was only 1,000 kilometers away from the coast of South America, i.e., the distance an ancient ship could cover in one week. 

This reminds me of the news that made headlines several years ago about artifacts of Phoenician origin discovered in South America. Highly improbable, it was thought, and the wildest speculations followed! Presently, in light of the shape and size of Atlantis, the find is not outlandish at all! Sailing from the Mediterranean across the Atlantic Ocean along the south coast of Atlantis was extremely convenient as the ships could stop at so many ports on their way! When Atlantis disappeared, this communication route vanished and all memory of this once so-powerful kingdom was erased at the same time. 

Now there is the story of Atlantis everybody is familiar with a series of successive circles around a central island. Based on Critias’ account, this central island had a diameter of 1,000 meters. It was surrounded by two circles of land and three of water. This is the location of the Palace of Atlantis. The ditch around the central island was connected with a 9,500-meter-long canal to the sea. The total diameter of these combined circles was 5,000 meters! Hard to imagine! 

The Palace of Atlantis was the residence of the Major King. Critias noted that it was of astonishing size: 200 meters wide and 200 meters long, standing 100 meters tall. It was bigger than St Peter’s Basilica in Rome. Atlantis was divided into ten kingdoms, each with its own king, subordinate to the Major King, the direct descendant of Atlas, son of Poseidon, and founder of Atlantis. Solon said that the god was held in high esteem by the Atlanteans, as quoted by Critias: “They placed golden statues, the god (Poseidon) to be upright in his chariot, holding the reins of six winged horses, and this complex was so tall that it almost touched the top of the roof of the temple. Around him, seated on dolphins, there were a hundred Nereids along with innumerous other statues around, dedicated to exceptional individuals.” 

All the above takes me to Alexander, as I so often speculate about his knowledge of the world when he set out to conquer Asia. He, and his selected circle of friends, had been tutored by Aristotle, a pupil of Plato. In this light, history deserves to be rewritten. We should be aware that besides Alexander, all of his Companions and later generals and kings in their own right, were aware of a world much larger than we generally assume!

[All details with clear drawings and maps are made available by Sotirios Sofias in his study Atlantis: A real continent and not fiction according to the dialogues Timaeus and Critias of Plato]