Kohlmarktbrunnen, Water well and architectural heritage monument in Kohlmarkt, Brunswick, Germany.

Kohlmarktbrunnen is a stone water well located at Kohlmarkt square in Brunswick, featuring carefully crafted stonework that combines both functional and decorative elements. The structure serves as a central visual landmark that defines the character of the square.

A fountain on Kohlmarkt is first documented in 1391, fed by the Jödebrunnen and named Ulrichsbrunnen after the nearby St. Ulrich's Church, demolished in 1544. It was rebuilt between 1660 and 1662, possibly prompted by a push for cleanliness after the 1657/58 plague. After 1865, when it no longer supplied drinking water, Oskar Sommer's neo-Renaissance design won first prize and was built in 1868/69, later moved slightly northeast and, after World War II, northwest.

The fountain's name recalls the Ulrichsbrunnen, first documented in 1391 and named after the nearby St. Ulrich's Church, demolished in 1544. Its water came from the Jödebrunnen, as did that of the early fountain on the Altstadtmarkt. In 1570 the fountain on this site was reportedly partly gilded.

The well sits centrally on Kohlmarkt square and is easily accessible on foot within Brunswick's pedestrian zone. Visitors should plan their visit during less crowded times of day to better appreciate the structure and surroundings.

The bronze tritons kneeling on the eight corner pillars each hold a raised left hand blowing a horn that feeds water into the upper basin, while the right hand hangs down holding what appears to be a large coin. Eight bronze lion heads at mid-height of the pillars spout water into the octagonal basin.