His first sculptural work were the tombs, at both sides of the main altar, of the first two Portuguese kings, Afonso I and his successor, Sancho I. The kings lie on their tombs, clad in full armour, with hands joined in prayer and a lion or dog (symbol of fidelity) at their feet. Their serene expression is such that one would think that they are asleep. The tombs are set in large niches richly decorated with statues, flowers and medaillons in Late Gothic and Early Renaissance style, with on top the crosses of the Order of Christ.