The Government of Saint Petersburg and the Council of Rectors of Saint Petersburg organized the 1st Saint Petersburg Spatial Development Forum (city planning) Harmony of Complexity from 22 to 24 May 2015. The Secretary General of the IDC Berlin, J. Christian B. Kirsch, was officially invited to participate as a key speaker to share his experience in the field of dialogue among cultures and here in particular with the focus on Ecological Arts & Architecture. In his speech Mr. Kirsch underlined his close relationship to St. Petersburg – the city most delegates came from to the Founding Assembly of the IDC in Berlin 1994 and the host of the first Delphic World Congress in 1996 under the patronage of Anatoly A. Sobtshak. 2003 the Governor of St. Petersburg awarded the IDC Secretary General JCB Kirsch as Ambassador of Honour.