The entire historical centre of Campeche is oriented on a northeast/southwest axis, so all structures and streets conform. The cathedral, an undistinguished building both inside and out, complies. Its construction commenced in the year the town was founded, i.e. 1540 CE, but continued for a goodly number of years thereafter. There is a chapel to the left, then a courtyard immediately behind (described as a garden [with sanitarios] for meditation), and a further chapel dedicated to Jesus of Nazareth that currently serves as a museum. As usual, the complex overlooks the main plaza, along Calle 55.