Introduction: St. John's Church (St. Johanniskirche)

St. John's Church, also known as Johanniskirche, is Germany's second oldest surviving episcopal church, after the Trier Cathedral. Notably, it is the country's only remaining cathedral from the Merovingian, late Carolingian, and early Ottonian periods. Dating back to the early medieval era, its construction began in the 7th century. Although predominantly Carolingian in style, St. John's Church has undergone numerous exterior additions over the centuries, resulting in a blend of architectural influences visible today (Faccani, 2020). The church consists of three naves and is currently under the patronage of John the Baptist. Originally a Catholic church, it was acquired by the Protestant community in 1828 and continues to honor St. John the Baptist as its patron saint.
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BIBLIOGRAPHY
1. Faccani, G. (2020). St. Johannis von Mainz: archäologische Präliminarien zur Baugeschichte einer evangelischen Gemeindekirche. In: S. Lomartire, Archeologia del territorio, 63-92.