The Lost, Last Words of Mies Van der Rohe. The Lohan Tapes from 1969.

The German-American architect Dirk Lohan began to record his conversations with his grandfather Ludwig Mies van der Rohe in the summer of 1969. The tapes, recorded during the final weeks of Mies's life, captured some of the architect's very last words. They were to the Museum of Modern Art in New York after his death, though they went missing under unknown circumstances.