It is located in the Episcopal Gallery of the Cathedral and has eight rooms where around 500 pieces from the 17th and 18th centuries are exhibited.

The collection includes sculptures, liturgical furniture, choir books, religious artifacts, and works by renowned artists such as Juan Correa, Antonio de Torres, and José Juárez, among others.

The room dedicated to the bishops displays the physical and pictorial representation of each of the bishops of Durango.