Chapel for four religions under a water tower

Immigrants from Ukraine, Kazakhstan, Georgia, Abkhazia, Armenia and Russia are living together close to the water tower. They believe in different religions or belong to different churches. But most of them are exposed to a pressure from the Orthodox Church to become Orthodox Christians.Common to these religions and churches (Christians Orthodox, Christians Catholics, Christians Armenian Orthodox, Muslims) is the importance of water.My proposal is to build a multi-religion chapel under the already existing water tower. Every religious group will have their symbols in one of the four corners of the closed water tower. Water drops will fall through a small hole in the water tank and come down in the center of the floor.