In 1518 German mathematician Adam Ries went to Erfurt and ran a mathematics school there. At the ‘House to the black bugle’ (Haus zum Schwarzen Horn) two of his mathematic books were published by printer Mathes Maler.
The facade of today was errected in 1549 in the style of Renaissance. Above the door you can see two black bugles refering to the name of the building. Today the Haus zum Schwarzen Horn houses a bar & lounge named Modern Masters.