The Great St. Martin Church, located in Cologne, Germany, is a Romanesque Catholic church that dates back to the 12th century. The church is situated in the old town of Cologne, near the Rhine river and the city's famous cathedral.

The church was built on the site of a previous chapel in the 10th century and was later rebuilt in the Romanesque style between 1150 and 1250. It is characterized by its distinctive twin towers and its impressive central dome. The church also has a number of beautiful stained glass windows, some of which date back to the 13th century.

Throughout its long history, the Great St. Martin Church has been a center of religious and cultural life in Cologne. It served as a Benedictine abbey until the 19th century and has also been used for a variety of other purposes over the years, including as a military barracks, a hospital, and a cultural center.

Today, the Great St. Martin Church remains an important landmark in Cologne and is a popular destination for visitors. The church is open to the public for guided tours and visitors can climb to the top of the towers for a stunning view of the city. The church also hosts regular concerts and other cultural events throughout the year.