Andergasse 106, Medieval architectural structure in Hambach an der Weinstraße, Germany.

Andergasse 106 is a house in the Hambach district of Neustadt an der Weinstraße. Its cellar entrance is framed by a medieval pointed arch that was originally a window in the nearby Kästenburg, later Hambacher Schloss. The arch, carved around 1250, shows a round moulding and bossed stonework typical of the so-called mixed style.

The pointed arch in the cellar doorway was originally a window in the residential building of Kästenburg Castle, later rebuilt as Hambacher Schloss, and dates from around 1250. It was reused as a cellar door frame when the house was built, presumably around 1800 by the owner Johann Adam Endlich. The house now belongs to the Norbert Glas family.

The pointed arch is a listed spolium, protected as a monument; the house itself is private property of the Glas family. Since the 2000s an information board titled "Spitzbogen von der Kästenburg" has stood on the building, one of several such panels put up in Hambach to explain local history to passers-by.

The building sits at the southwestern edge of the Hambach settlement and is easily reached via Andergasse street. An information panel is mounted on the house, providing visitors with context about its architecture.

The arch was a window in the residential building of Kästenburg castle before it was moved here. Its round moulding and bossage place it in the so-called mixed style of around 1250. The owner Johann Adam Endlich had it built into the cellar doorway, presumably around 1800.