トリーア大司教
In 1309 and 1312, Emperor Heinrich VII pledged Boppard along with its outlying lands to his brother, Archbishop Baldwin of Trier. The Boppard townsfolk, however, felt that this merger with the Electorate of Trier was unlawful. They tried to struggle against what they saw as a foreign ruler and in 1327, they set up their own council. After a short siege, Baldwin had the town stormed and quelled this challenge to his authority, thus absorbing the town of Boppard into the Electorate of Trier. Baldwin then had the toll castle – the "Alte Burg" ("Old Castle") – expanded, which was also meant to ensure his lordship over the town.