The al-Otrush Mosque is a funerary mosque commissioned to serve as his mausoleum by Amir Aq-Bagha al-Otrush in 1403 (and completed by his successor Amir Damir Dash). It is "one of the finest Mamluk buildings in Aleppo."
I made it a point to take pictures of the whole western side which is magnificent, walking from left to right.