Peter of Aspelt (c. 1245 - 5 May 1320) was the Archbishop of Mainz from 1306 until 1320, and the Bishop of Basel from 1297 until 1306. Peter was born in Luxembourg. He was educated in the Abbey of St Simeon in Trier, and after his study in 1280 became a minister in Riol and Birthingen, and later in Trier. In 1286 he was made the chaplain and physician of King Rudolph I. As Peter was not a nobleman, he did not receive a provostry in Trier, and instead in 1289 entered the service of King Wenceslaus II of Bohemia, serving as his chancellor from 1296 until 1305. Peter arranged the alliance between Wenceslaus and Albert I of Austria, and when Albert was elected king of Germany he was rewarded with the Bishopric of Basel.