Schneppenbach was administratively tightly bound with the Schmidtburg castle, which nowadays stands within the village's municipal limits. The castle, whose beginnings go back at least as far as 929, and possibly as far as 926, is one of the oldest in the Nahe-Hunsrück region and is believed to have been the family seat of the Counts in the Nahegau, the Emichones. Their coheirs and rightful successors, the Waldgraves, owned the castle in the 12th and 13th centuries. Internal Waldgravial family disputes, however, resulted in ownership being transferred about 1330 to Archbishop and Elector of Trier Baldwin of Luxembourg. Under Baldwin, the castle was expanded, and in the time that followed, it became the seat of the Electoral-Trier Amt of Schmidtburg.
The castle was destroyed during the War of the Grand Alliance (1688–1697) by French troops in 1688. Today impressive large ruins remain.
The Jan Hus Memorial stands at one end of Old Town Square. The huge monument depicts victorious Hussite warriors and Protestants who were forced into exile 200 years after Hus, and a young mother who symbolises national rebirth. The monument was so large that the sculptor designed and built his own villa and studio where the work could be carried out. It was unveiled in 1915 to commemorate the 500th anniversary of Jan Hus' martyrdom. The memorial was designed by Ladislav Šaloun and paid for solely by public donations.
Born in 1369, Hus became an influential religious thinker, philosopher, and reformer in Prague. He was a key predecessor to the Protestant movement of the sixteenth century. In his works he criticized religious moral decay of the Catholic Church. Accordingly, the Czech patriot Hus believed that mass should be given in the vernacular, or local language, rather than in Latin. He was inspired by the teachings of John Wycliffe.