It's easy to be amazed, and then wander inside to explore some more. But it's worth exploring the facade in more depth, if you have time (your camera zoom-lens wil be helpful). The statues are mostly from the workshop of Giovanni Pisano, who designed the frontage in 1284, although the mosaics date from the nineteenth century (made by Venetian artists). There's am amazing range of statues and carvings: people, geometric twiddles, tiny angels, animals, birds.....even a Green Man hidden away (see tip below).
Remember that Medieval sculptors based faces in their carvings on people they knew.........you are looking at images of real people. And it didn't matter if the carving was too high up for people to see it, for it would always be visible to God.

