The naming of this bastion as "St. Philip", as also indicated on a plaque at the foot of the bastion, as well as in some modern fortress guides, is historically inconsistent. Either the bastions are named after their last name from the 19th century: Marie (I), Carl (II), Ludwig (III), Luitpold (IV) and Maximilian (V). That would be consistent with the usage of the Bastion Marie, which is used for gastronomy today. Or you leave the naming of the bastions after the epoch of their last form between 1700 and 1741. Then the names would be: St. Kunigund (I), St. Valentin (II), St. Lothar (III), St. Sebastian (IV) and St. Henry (V) right. A colorful mishmash, as is currently the case, is historically inconsistent and misleading from the epochal classification.
Said bastion Sebastian occupies a special position anyway. When it was built in 1659-1663, it was called St. Philipp (after its first builder, Philipp Valentin Voit von Rieneck). Shortly after its completion, the bastion had become dilapidated again due to water ingress and partially collapsed on March 22, 1668. It was renovated by the then Prince-Bishop Marquard Sebastian Schenk von Stauffenberg by 1693 and consequently renamed St. Sebastian after its new builder. This, as well as the year 1693 (MARQVARD: SEBASTIAN: ... RESTAURAT ANNO MDCXCIII), is noted in an inscription on the monumental coat of arms attached halfway up the bastion.