Senatorial districts of the Philippines

The senatorial districts of the Philippines were the representations of the provinces of the Philippines in the Philippine Senate from 1916 to 1935. == History == The enactment of the Philippine Autonomy Act (popularly known as "Jones Law") in August 1916 by the United States Congress provided for the creation of a bicameral legislature consisting of a lower chamber (House of Representatives) and an upper chamber (Senate).

Source: Wikipedia — Senatorial districts of the Philippines (CC BY-SA 4.0)