Muslims built a great many observatories, but the largest observatory in the world in its time was built at Maraghah in 1258 A.D. (657 A.H.)
Waislamu walijenga sehemu nyingi kubwa za tathimini na matazamio, lakini kubwa kuliko zote duniani kwa wakati ule ilijengwa Maraghah mnamo mwaka 1258 BK (657 BH).