Haus Bachem, Heritage building in Königswinter-Altstadt, Germany.

Haus Bachem is a two-story residential building in Königswinter's old town featuring seven window axes arranged along its plaster facade. The building displays sash windows with shutters and frames made from trachyte stone, giving it a uniform classical appearance.

The building was constructed in 1825 by stonemason Theodor Bachem and shaped the character of the old town. It received a notable royal visit from the future King Edward VII in 1857 when he passed through the region.

The ground-floor hall has hosted the annual opening of the Winzerfest in autumn since the 1988/89 renovation. The former carriage house at Drachenfelsstraße 6 became the registry office, with the old garage serving as the wedding room.

Haus Bachem stands at Drachenfelsstraße 4 on the Marktplatz, facing the Rathaus and bordering the grounds of St. Remigius church. The mayor's offices occupy the first floor, so the interior is not open to visitors; the facade, the 1910 conservatory with Carl Bachem's initials, and the rear park are best seen from the public square and street.

Two decorative sandstone dragon heads that once served as water spouts remain preserved in the rear garden among mature trees. These unusual ornaments reveal the craftsmanship details that visitors often walk past without noticing.