Huejotzingo is the oldest of the fourteen, constructed in 1524. It is also one of the most impressive for the variety of elements which have been preserved well. The atrium has four corner chapels which are some of the most elaborate of their type from colonial Mexico. There are finely crafted from sandstone. The main altarpiece is from the 16th century with only three in Mexico as old as it. The atrium cross has a detailed crown of thorns. The remains of the aqueduct can be found on one of the atrium walls.