In 2001, Artist Ha Schult Wrapped a Former Berlin Post Office in Thousands of Oversized Love Letters Collected From the Public 

German conceptual artist HA Schult (b. 1939) has often worked in the realm of other people’s trash, creating large scale-works that force art into everyday life and call attention to the massive consumption of Western society. In Schult’s installation “Trash People,” he built

Source: In 2001, Artist Ha Schult Wrapped a Former Berlin Post Office in Thousands of Oversized Love Letters Collected From the Public | Colossal