https://www.reddit.com/r/ancientrome/comments/7g0i1a/4th_cen_roma_fort_mobine_part_of_the_limes/
https://preview.redd.it/ij6kgi7pgm001.jpg?width=960&crop=smart&auto=webp&s=3cd7a4ce827f529e81e02e7c42da85d79b25bd32
Probably "Castra" Arabicized = "Qasr", eh?