|Udruh lays east of Petra (Wadi Musa). There are
two structures of importance to this survey there. Originally
this large area was a Nabataean settlement with a temple. Later
it became a Roman fortress, then Byzantine and finally Islamic.
The Ottomans rebuilt the fortress and Qasr at the northern wall
of the fortress to protect the Hejaz Railway. The fortress at
Udruh saw continued use throughout the Byzantine and Islamic
periods. See http://opgravinginjordanie.nl/
The large fortress area seems to face Petra (1.70° off) and
the smaller Qasr seems to face a between qibla being off by only
3.88°. It is hard to believe that these were not intentional,
as they are so close to these qibla directions.