The Federal Convention (German: Bundesversammlung or Bundestag) was the only central institution of the German Confederation from 1815 until 1848, and from 1850 until 1866. The Federal Assembly had its seat in the Palais Thurn und Taxis in Frankfurt. It was organized as a permanent congress of envoys. The Federal Assembly was created as a permanent congress of envoys of all member states, which replaced the former imperial central power of the Holy Roman Empire. The Federal Assembly took its seat at the palais Thurn und Taxis in Frankfurt, where it met once a week after November 5, 1816.