The Kaiser Wilhelm Memorial Church, known in German as the Kaiser-Wilhelm-Gedächtniskirche, is a prominent historical edifice located in Berlin, Germany. Constructed in the 1890s, the church was dedicated to Emperor Wilhelm I. During World War II, the church was heavily bombed, and its ruins have been preserved as a war memorial. A new, modern church building, featuring a separate bell tower and a foyer, was built alongside the remains between 1959 and 1963, designed by architect Egon Eiermann. The old church spire, still standing, is nicknamed 'the hollow tooth,' and its ground floor serves as a memorial hall. The new church is characterized by its hexagonal shape and walls made of a concrete honeycomb containing 21,292 stained glass inlays that create a striking blue glow inside. The church today stands as a powerful symbol of Berlin's history and resilience, its contrasting architectural styles serving as a poignant reminder of the city's destruction and rebirth. It's not just a historical landmark but also an active church that offers services, concerts, and exhibitions, playing an essential role in Berlin's cultural landscape.