Bauska District (Latvian: Bauskas rajons) is a district in zemgale. The principal city is Bauska. Zemgale (also historically known as Semigallia or Semigalia) forms an historical region of Latvia, sometimes also including a part of Lithuania. ... Bauska- town in Zemgale- southern Latvia, 70km from capital- Riga and 20km from border with Lithuania, between rivers Musa and Memele in a place where they join and form Lielupe river. ...