Scope and Contents This manuscript is a copy of the perpetual calendar traditionally known as the Ruzname ("almanac") of Şeyh Vefa. It is comprised mainly of tables for calendar conversion with instructions in Ottoman Turkish (in Arabic script). The volume contains eight coloured discs, one of which marks the qibla, or the direction towards the Kaaba in the Sacred Mosque in Mecca (pictured at the centre of the disc). Two of the other discs are volvelles, i.e.,...