Ulm Minster is a Gothic church located in Ulm, State of Baden-Württemberg. It was originally built as a Roman Catholic church but became a Lutheran Church in the 16th Century. It is the tallest church in the world and in Europe. The church was the fifth-tallest structure in the world when the towers were completed in 1899, with a steeple meas…Ulm Minster is a Gothic church located in Ulm, State of Baden-Württemberg. It was originally built as a Roman Catholic church but became a Lutheran Church in the 16th Century. It is the tallest church in the world and in Europe. The church was the fifth-tallest structure in the world when the towers were completed in 1899, with a steeple measuring 161.53 metres.