Mainz Cathedral was the coronation site for Philip of Swabia, for Frederick II, and anti-king Henry Raspe. Speyer Cathedral is the world's largest preserved Romanesque church (after the demolition of Cluny Abbey) and today a UNESCO World Heritage Site. It was built starting about 1025 by King Conrad II as a family vault for the ruling Salian dynasty. His successor Henry III donated the Speyer Gospels in 1046; the building was completed in 1061 under the rule of King Henry IV. During the Investiture Controversy with Pope Gregory VIII, he had the church again extended from 1081, in order to stress his Imperial authority.
Henry III
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