What’s My Line?

OK, all you fine folks. It’s time for a contest.

We walked by this building in Mérida, Mexico a couple of times. I thought it might be in the running for the most charming structure on Earth, but maybe that’s just me. We mulled it over as we walked, trying to guess what function it might have served. It’s not readily apparent. It started to bug me. I must know! So the third time we passed by, I asked, and was very surprised to find out the answer.

Now it’s your turn. Everyone gets three guesses. What is this building for? What would a person do there? The only clues are what you see in the two pictures.

In the great tradition of Don Rickles, the winner gets a cookie.