This city is fascinating place. All the downtown buildings for quite a long way are painted yellow. There is a huge cathedral/monastery in the main square that has an atrium second in size to the Vatican. Throughout the town there are multiple Mayan ruins just blended into the regular streets and easy to wander into. As with many of the other churches and cathedrals in the area, the huge main cathedral and downtown houses were actually built with stones from the Mayan ruins the Spanish knocked down.
Touring the town by horse and carriage was our favorite transportation. Yes the horses wear sombreros.
I love windows and doors in Mexico. Details are important and they always seem to capture a more magical element than modern fibre glass inserts do!