Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 38, Prayers and commentary. This manuscript was written in Turkey, A.H. 889 (1484), in Arabic, with commentary in Ottoman Turkish. It is a collection of prayers in Arabic, each preceded by a commentary in Ottoman Turkish, with a diagram (f. 217v) and information at the end for calculating the direction of Mecca from different latitudes.

You can see the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata from OPenn.  You can also download a copy of this video from ScholarlyCommons, the University of Pennsylvania’s open access institutional repository.