Upper and Lower Zeta were mentioned in medieval documents. Lower Zeta included the maritime belt from the Luštica bay and Grbalj to the Bojana river, while Upper Zeta spanned over a branch of the Lovćen mountain below Kotor to the eastern banks of the Skadar Lake and Zeta river. Mentioning of Upper and Lower Zeta in the 15th and 16th century are scarce. Reliable documents show that up until the end of the 15th century, the term Zeta was simply used encompassing Pješivci, Malonšići, Očinići, Lopate and Bjelice.
