Short answers, pulled from the story.
Das Buddhistische Haus is a Theravada Buddhist temple complex in Frohnau, Berlin, Germany. It is considered the oldest and largest Theravada Buddhist center in Europe and has been declared a National Heritage site.
The main building was completed in 1924. It was commissioned by Paul Dahlke, a German physician, and designed by architect Max Meyer. The design incorporates elements of Sri Lankan Sinhalese Buddhist architecture.
Asoka Weeraratna, founder of the German Dharmaduta Society based in Sri Lanka, saved the building. In December 1957 he purchased it from Dahlke's nephew on behalf of the Trustees of the German Dharmaduta Society and had it renovated as a Buddhist temple complex.
By 1941 the Nazi government had prohibited all Buddhist meetings and publications. The building fell out of use, and after the war refugees occupied the quarters, causing the complex to deteriorate to the point of near demolition.
Paul Dahlke wrote: "What we are doing, anybody shall be able to see. What we are saying, anybody shall be able to hear. What we are thinking, anybody shall be able to know." The inscription reflects a commitment to complete transparency.
The temple is open to the public and was visited by about 5,000 people in 2006. The complex includes a library, a meditation room, and a garden that holds a sculpture of Guanyin donated by the city of Nagoya in 1959.