Divi Blasii is a three-aisle, cruciform hall church, situated on the Untermarkt (Lower Market) in the historical centre of the town.

The elaborately designed display façade with tracery, pinnacles and a wheel window on the north side is located on an old trade route.

To mark the change of the city's council in 1708, he composed the festive cantata Gott ist mein König ("God is my King") for performance in the two principal churches.

Since secularisation, it has been the central church of the Protestant parish of Mühlhausen and a venue for concerts and art exhibitions.

The tracery rose, the Wimperg portal and the choir polygon – here especially the low plinth storey, the high windows and the roof gables – clearly show influences from cathedral buildings in northern France.

Inside the church, there are important gravestones from the 13th and 14th centuries, a late Gothic pulpit, epitaphs from the Renaissance period, an octagonal baptismal font from 1596, and a Luther statue from 1903.

The high altar in the choir polygon has been largely preserved and shows the life of the Virgin Mary and depictions of saints.

The choir also houses, among other things, a portrait of the former Mühlhausen superintendent and church hymn poet Ludwig Helmbold.

Although he did not stay in the town for long, the authorities recognised his musical abilities, and made him the consultant for rebuilding the organ.

It has been suggested that one of his works, a version for three manuals and pedals of A Mighty Fortress Is Our God (catalogued as BWV 720), may have been written specially for it.

The new instrument was built by the Alexander Schuke organ building company in the 1950s as their opus 293,[9] it was originally inaugurated in 1959 and again after a general overhaul on 14 September 2008.