The Cathedral of Mérida, begun in 1561 and consecrated in 1598, is the oldest functioning cathedral on the American mainland. It faces the Plaza Mayor, taking up the entire eastern side of the square, and its two towers are visible from most of the historic centre. The façade is austere — deliberately so, reflecting the Counter-Reformation style of the Franciscans who oversaw construction — with thick walls and small windows that keep the interior dramatically dark and cool.
Inside, the star attraction is the Cristo de las Ampollas (Christ of the Blisters), a large crucifix whose blackened, blister-marked surface is explained by legend as miraculous survival of a fire that destroyed a chapel in the nearby town of Ichmul in the 17th century. The image was brought to Mérida and is venerated in a chapel to the left of the entrance. The rest of the interior was stripped during the Revolution of 1915 and is relatively bare, which has the unintended effect of making the architecture itself more visible. Entry is free; the cathedral is in regular use and visitors should be respectful during masses.