How many churches are there in the world? How are they constituted? What do their internal workings look like? Schleiermacher, who himself was engaged in many disputes in church politics, thought that prospective pastors should know about questions such as these, and delivered lectures on church geography and statistics, i.e. contemporary church studies. These lectures, documented in Schleiermacher's own manuscripts and his students' notes, are published here for the first time.