INDESEM (International Design Seminar) is a student-led workshop that has been organised more than 20 times at the Faculty in Delft. The first edition happened in 1964, when Dutch architect Aldo van Eyck was appointed professor. After another edition in 1967, the seminar wasn't held until Herman Hertzberger re-initiated it in 1985. Ever since, it was organised biennially or annually.
