The Cathedral, the main church of Verona (but in my opinion not the most beautiful one) is dedicated to S. Maria Assunta and it is one of the examples of romanesque style in Verona. This church is part of a bigger complex of architectural buildings which include S. Giovanni in Fonte, S. Elena, the cloister, the Capitular library and the bishop’s residence. Here lives and celebrates the bishop, this is why it is considered the main church of Verona.
The origins of this complex are very old. As a matter of fact, in this area a palaeo-christian church was built (exactly where S. Elena church is now).The cathedral was consecrated by St. Zeno, bishop of Verona between 362-380 A.d., but after a few years, it was replaced by a larger basilica because its dimensions weren't suitable anymore. If you visit this part of the basilica now you can't see all the original parts, but a few remains are still visible, for example some beautiful mosaic floors. You can't see the old church because in 7th century a fire or an earthquake hit Verona destroying this paleo-christian building.