Bundestagn.

Bundestag (n.)German federal council, 1879, from German Bundestag, from genitive of Bund "league, confederacy, association" (related to English band (n.2) and bind (v.)) + tag, literally "day;" as a verb, tagen, meaning "to sit in conference" (see day; also compare adjourn). Hence also Bundesrat, from rat, rath "council" (see read (v.)).