Duties of Velasquez' royal offices also occupied his time. He was eventually made marshal of the royal household, and as such he was responsible for the royal quarters and for planning ceremonies.
In 1660 Velasquez had charge of his last and greatest ceremony--the wedding of the Infanta Maria Theresa to Louis XIV of France. This was a most elaborate affair. Worn out from these labors, Velasquez contracted a fever from which he died on August 6.