The "Erlöserkirche", or Church of the Redeemer, is also known as Bad Homburg's "Hagia Sophia". It is the city's main protestant place of worship as well as the best-preserved example of the Kaiser Wilhelm's II national church construction progrramme. The magnificent structure has been providing Protestants a spacious place of worship since its consecration in 1908. Today, it also serves as a popular event venue. Its mighty square towers characterise Bad Homburg's cityscape along with the Catholic St Mary's Church and the neighbouring "White Tower" of Bad Homburg Castle. The church interior was designed in the style of the Neo-Byzantine. The church's altar cross, which is adorned with various gemstones, was originally destined for the Church of the Redeemer in Jerusalem by order of Empress Auguste Victoria. Her husband, Kaiser Wilhelm II, and she were responsible for the construction of the church, both financially and ideally. Established in1908, the Bach Choir ranks amongst the most renowned in the Rhine-Main region.