Detail
Type Schloss - Rusteberg is a Schloss (Castle).
Kr Heiligenstadt - The Kreis for Rusteberg is Heiligenstadt. A Kreis is a government district (similar to a U.S. county).
See Marth 2) Eichsfeld - A See notation means the entry is dependent on another entry. In this case, Rusteberg is dependent on Marth 2) Eichsfeld, which should be consulted for additional information.