Apollodorus of Damascus (Ancient Greek: Ἀπολλόδωρος ὁ Δαμασκηνός) was an architect and engineer from Roman Syria, who flourished during the 2nd century AD. As an engineer he authored several technical treatises, and his massive architectural output gained him immense popularity during his time. He is one of the few architects whose name survives from antiquity, and is credited with introducing several Eastern innovations to the Roman Imperial style, such as making the dome a standard. He is also known as Apollodorus Mechanicus.
Apollodorus was born in Damascus, Roman Syria. Modern sources refer to him as Nabatean, or as Greek. Neither Cassius Dio nor Procopius, scholars and historians of antiquity, mention his origins when writing of him. Little is known of his early life, but he started his career as a military engineer before meeting future emperor Trajan in Damascus, then being summoned to Rome by him when he was a consul in 91 AD, after his twentieth birthday,: 35 and later accompanying him during the Second Dacian War in 105 AD.
Apollodorus was Trajan's favoured architect and engineer.
In Rome he designed and oversaw the construction of:
Outside the capital, Apollodorus designed the:
He is the author of Siege Engines (Πολιορκητικά), dedicated to an unnamed emperor, likely Trajan.
The director of the Italian Institute of Culture in Damascus, Fiorella Festa Farina, described the technical prowess of Apollodorus as stemming from his cultural roots and the architectural tradition of Syria; and that he owed his particular mastery to Nabataean culture filtered through Greek modes of thought. He was known for his practical and robust designs. It was likely due to his influence that domes became a standard element in Roman architecture.
Cassius Dio reports that Apollodorus offended Hadrian by dismissing and ridiculing the emperor's forays into architecture, which led to his banishment and death. While some, considering this episode as consistent with Hadrian's documented acts of anger and violence, do believe the execution occurred, many modern historians cast doubt on this event. According to the historian Jona Lendering, modern scholarship views the anecdote as unlikely to have occurred, due to Hadrian's preoccupation with far greater threats to his power early in his reign, and that the criticism Apollodorus proffered was acted upon.: para. 2
General info from Wikipedia.org