Now let us look at the architecture. The church follows a basilical plan, with a central nave flanked by aisles. But the real star is at the east end, where three apses open out to form a clover leaf, what architects call a trefoil plan or, in German, a Trikonchos. Two other great Cologne churches, Groß Sankt Martin and Sankt Maria im Kapitol, share this feature, which makes it a signature of Cologne's Romanesque style. The domed clover leaf chancel was built around 1200, and it is often called the glory of the church. Rising above, you will notice a soaring tower about 67 meters tall, and a Romanesque westwork at the opposite end of the church. Inside, the old and the new meet. The vault paintings in the trefoil choir were created by Hermann Gottfried between 1988 and 1993, giving this medieval space a fresh, modern spiritual energy. Look up and you will see how a contemporary artist answered a Romanesque canvas.