The interview was conducted on December 4, 2023 at the Amsterdam University library and a question list was sent to Mr. Wolff before the interview to seek his consent. The design process of the paving patterns and how he executed them were composed to form the list. The interview was recorded and transcribed. Willem Wolff is the former Sol LeWitt assistant with the layout of paving patterns and lives next to Koeriersterplein, the apartment complex was originally designed as one single block.