I visited this WHS in May 2014. It’s relatively unknown compared to other WHS in Italy but it truly is one of the Top WHS Italy has to offer. The huge mosaic floor is full of colour and incredible detail. The view from the belfry is nothing special although it allows you to see the cross-shaped roof of the basilica. The remaining mosaic floor from the nearby crypt can be clearly be seen here too. Although the mosaics are really special my personal highlight was the Cripta degli Affreschi with its vivid frescoes. It’s only second to the Cappella degli Scrovegni in Padua but still it’s really worth viewing.