Untererthal is a ward of the Bavarian town of Hammelburg in the Lower Franconian district of Bad Kissingen.

The Jewish population of Untererthal stood under the protection of the lords of Erthal and inherited the entire castle square when the family seat was destroyed in 1796.

As part of the infamous Kristallnacht the facilities of the synagogue were destroyed and rituals and services were stopped; however, the building had been left standing until 1945.

The American television sitcom Hogan's Heroes (which ran on CBS from 1965 to 1971), featured a fictional Stalag 13, said to be near Hammelburg, possibly in or near Untererthal.

Under Dietrich Georg von Erthal extensive rebuilding measures including a choir, nave and tower were undertaken in 1590.

In exercising these rights, the lords of Erthal built a tavern in Untererthal, but it was not until 1548 that the first innkeeper, Hans Murk, was mentioned.

The arches at the entrance, keystones, window frames and other structural aspects all date to this period of construction and are still integral to the inn.

Johann Josef Schäfer acquired the inn through marriage in 1895 and extended what is today the rear wing of the building.