Frankfurt regularly served as the site of the election from the fifteenth century on, but elections were also held at Cologne (1531), Regensburg (1575 and 1636), and Augsburg (1653 and 1690). An elector could appear in person or could appoint another elector as his proxy. More often, an electoral suite or embassy was sent to cast the vote; the credentials of such representatives were verified by the Archbishop of Mainz, who presided over the ceremony. The deliberations were held at the city hall, but voting occurred in the cathedral. In Frankfurt, a special electoral chapel, or , was used for elections. Under the Golden Bull, a majority of electors sufficed to elect a king, and each elector could cast only one vote. Electors were free to vote for whomsoever they pleased (including themselves), but dynastic considerations played a great part in the choice.