Twenty-five kings and queens of León and many children are buried in this pantheon, which is one of the earliest examples of Romanesque art. This is illustrated by the sturdy columns crowned by capitals decorated with plant motifs reminiscent of Asturian art or beautifully historiated in tribute to Visigothic traditions. The wonderfully preserved 12C frescoes feature an outstanding collection of New Testament themes, as well as scenes from rural life. The treasury on the first floor is a must.