Jerash in the context of "Caravan city"

Nicomachus of Gerasa (Ancient Greek: Νικόμαχος; c. 60 – c. 120 AD) was an Ancient Greek Neopythagorean philosopher from Gerasa, in the Roman province of Syria (now Jerash, Jordan). Like many Pythagoreans, Nicomachus wrote about the mystical properties of numbers, best known for his works Introduction to Arithmetic and Manual of Harmonics, which are an important resource on Ancient Greek mathematics and Ancient Greek music in the Roman period. Nicomachus' work on arithmetic became a standard text for Neoplatonic education in Late antiquity, with philosophers such as Iamblichus and John Philoponus writing commentaries on it. A Latin paraphrase by Boethius of Nicomachus's works on arithmetic and music became standard textbooks in medieval education.

Jerash Governorate (Arabic: محافظة جرش) is one of 12 governorates in Jordan. It is located in the northwestern side of the country. The capital of the governorate is the city of Jerash.

Jerash Governorate has the smallest area of the 12 governorates of Jordan, yet it has the second highest density in Jordan after Irbid Governorate. Jerash Governorate is ranked 7th by population.

A tetrapylon (plural tetrapyla; Greek: τετράπυλον, lit. 'four gates'; Latin: quadrifrons, lit. 'four fronts', also used in English) is a rectangular form of monument with arched passages in two directions, at right angles, generally built on a crossroads. They appear in ancient Roman architecture, usually as a form of the Roman triumphal arch at significant crossroads or geographical "focal points".

A tetrapylon was effectively a 'doubling' of the original triumphal arch form; with a total of four major arched openings, one on each side of the structure (one pair of openings opposite each other along one axis, and a second pair of openings of equal or lesser prominence perpendicular to the first pair; hence a structure with two barrel vaulted passageways, in the form of a cross). Roman examples are usually roughly square in plan, with the crossing archways of the same size; in some later examples, the plan is oblong, with the longer sides having a larger archway as for example at the Arc de Triomphe in Paris.

In the theatre of ancient Greece, the skene was the structure at the back of a stage. The word skene means 'tent' or 'hut', and it is thought that the original structure for these purposes was a tent or light building of wood and was a temporary structure. It was initially a very light structure or just cloth hanging from a rope, but over the course of time the skene underwent fundamental changes. First, it became a permanent building, whose roof could sometimes be used to make speeches, and as time passed it was raised up from the level of the orchestra, creating a proskenion, or "space in front of the skene". The facade of the proskenion was behind the orchestra and provided a space for supporting stage scenery.

During the Roman Period, the skene had become a large and complex, elaborately decorated, stone building on several levels. Actors emerged from the parodoi and could use its steps and balconies to speak from. It was also where costumes were stored and to which the periaktoi (painted panels serving as the background) were connected.

A cardo (pl.: cardines) was a north–south street in ancient Roman cities and military camps as an integral component of city planning. The cardo maximus, or most often the cardo, was the main or central north–south-oriented street.

A templon (from Greek τέμπλον meaning "temple", plural templa) is a feature of Byzantine churches consisting of a barrier separating the nave from the sanctuary near the altar.

The solid templon first appeared in Christian churches around the 5th century and is still found in many Eastern Christian churches. Initially it was a low barrier probably not much different from the altar rails of many Western churches. It eventually evolved into the modern iconostasis, still found in Orthodox churches.