The content of this seminar originates from an encounter with some buildings with a particular relationship to the unprogrammed. In this seminar 13 students, both Dutch and international, have researched realized buildings such as the Grote kerk in Veere and the School of Architecture in Nantes. A comparison will be made between old buildings and modern buildings, the average mod- ern buidings have restricted unprogrammed area for reasons of economy. The buildings will be analysed on the basis of what is unprogrammed and pro- grammed. As an excersise the building will be completely lled in with another program so it can be speci ed how much unprogrammed area can be lled with program. The researched buildings will be shown in this book.