Castile, Pedro Fernández de Velasco, Constable of Don
Haro, Pedro Fernández de Velasco, Count of Don
Fernandez de Velasco's daughter was abbess of the convent of Santa Clara, Medina de Pomar, near Burgos. He had begun construction of a chapel of the Immaculate Conception in the convent in 1460. His son finished paying for the chapel.
Ann Roberts. "The Master of the Legend of Saint Lucy: A Catalogue and Critical Essay." Ph.D. diss., (University of Pennsylvania, 1982): 92-95.
Hand, John O. and Martha Wolfe. Early Netherlandish Painting. (Washington, D.C., National Gallery of Art, 1986): 182 and n. 2.