Already in 1930, the Society announced international design competition which resulted in 129 designs (79 from Germany, 18 from Austria, 15 from Yugoslavia, and the rest from Switzerland, Italy, Czechoslovakia, Bulgaria and Hungary). The project of German architect Josef Wenzler was chosen. He planned a monumental, three-naves basilica, long and wide. Total floor area was to cover and host 4,300 people (3,390 sitting, 910 standing). It was to be dedicated to the Saint John of Capistrano who participated in the defense of Belgrade during the 1456 Ottoman siege. The Society disliked the location in Dorćol, but planned to build the cathedral anyway. After the ensuing money problems, it was disbanded and, ultimately, the central church for the Roman Catholics in Belgrade was never built. After World War II, the lot was nationalized by the state and the elementary school "Braća Baruh" was built on it.