Anonymous wrote:We got in on time. Lines were formed based on your ticket time. We did get in line about 15-20 minutes early, so were toward the front and entered right at our chosen time. The catacombs itself took about 45 minutes plus, then we spent about 15 minutes in the little gift shop. There's only one entrance and exit and they are not at the same place...the exit is about 10 minutes away from the entrance. Hope that helps.
And it’s self guided. So if you want to do it all quickly, you can do that. They’ll let you in right at the time on the tickets.