Proper noun
Bosra
A town in southern Syria.
They were strategically located near or along the Via Nova Traiana, a new road built by the Emperor Trajan in A.D. 111-114 to link the port of Aila, modern Aqaba, with Bosra, capital of the province of Arabia. Source: Internet
The earliest surviving example is at the Great Mosque of Bosra in Syria, where a narrow external flight of steps leads to the mosque’s roof. Source: Internet