Gaffel Haus, Heritage monument in Altstadt-Nord, Germany.

Gaffel Haus is the oldest building on Alter Markt in Cologne's Altstadt-Nord, a twin structure whose present form dates to 1580, when Benedikt von Schwelm built it; the year is still visible on the facade's wall anchors. Since 1987 it has housed a Gaffel brewery brewpub, and a gallery called the Hängestube with 40 seats runs above the door front and side walls.

The building has existed since at least 1213 and gained its current form when the northern section was acquired in 1580. The two halves originally had separate names, reflecting how the house developed from two connected structures into one unified property.

The brewpub is run by Cologne's private Gaffel brewery, which opened its "Spezialausschank" here in 1987; the house has carried the name Gaffel Haus since then. A gallery built as a mezzanine above the door front and side walls holds 40 seats and keeps the traditional name Hängestube. The house is one of the historic stations on the Kölner Brauhauswanderweg, a walking route linking the city's brewpubs.

The brewpub entrance sits on Alter Markt, the oldest building on the square; the year 1580 is still legible on the facade's wall anchors. Inside, a gallery level called the Hängestube holds 40 seats above the door front and side walls. Since the September 2015 renovation the pub has included sports bar elements.

The southern half received the name 'Zum Dorn' in 1630, while the northern section was originally called 'Zur Brezel'. These distinct names reflect the separate past of the two parts before they became one building.