The baptistery in Verona alone is worth a visit. Mind you, I don't imagine that it is used as shown; the priest would need to nimbly leap over the outer barrier in order to baptize a child in that inner tin bowl.
The outer barrier is the most interesting thing. It shows scenes from the infancy narratives of our Lord's life.
Above we can see the annunciation. This is the only picture I didn't take; this came from the web. My companion alerted me afterwards to what I had missed. That figure on the right would appear to be making 'the horns', the ancient sign mocking a cuckold. I had heard (to my distaste) that to some in the middle ages, St Joseph was a fun figure, cuckolded (as it were) by the Holy Spirit. Is that what this image shows?