Spaniards was probably made due to the recent Spanish successes in conquering Granada (1492) and Cephalonia (1500). Appealing to the Spanish monarchs through mentioning the traditional titles held by the Aragonese crown in Greece (Duke of Athens and Duke of Neopatras), Andreas hoped that the Spaniards would launch a crusade from their holdings in Apulia, Calabria and Sicily, conquering the Peloponnese before moving on to Thrace and Constantinople. Neither Ferdinand nor Isabella, nor any succeeding monarch of Spain, ever used the title. Andreas's widow Caterina was given 104 ducats by Pope Alexander VI to pay the costs of his funeral. He was buried with honor in St. Peter's Basilica, next to his father Thomas. Since Andreas and Thomas were buried in Rome, their graves survived the destruction and removal of the tombs of the Palaiologan emperors in Constantinople during the early years of Ottoman rule, but modern efforts to locate their graves within the Basilica have not succeeded. Possible descendants Barring the claims of the French kings, considered invalid by Andreas, and the claims or later impostor pretenders and forgers, Andreas was the last claimant to the position of Byzantine emperor. He is commonly believed not to have left any descendants. According to Donald Nicol in The Immortal Emperor (1992), it is possible that Constantine Palaiologos, who was employed in the Papal Guard as a commander, was a son of Andreas. Constantine is recorded to have died in 1508, just six years after Andreas. Russian sources accord Andreas a daughter by the name Maria Palaiologina, unmentioned in Western sources, who was married off to the Russian noble , Prince of Vereya, by her aunt (Andreas's sister) Sophia. A 1487 Roman epitaph honors a "Lucretiae Andreae Paleologi filiae" ("Lucretia, daughter of Andreas Palaiologos"), dead on 2 September 1487, but since she is described as having died at the age of 49, she cannot have been the daughter of the would-be despot and emperor Andreas Palaiologos. On 17 July 1499, Ludovico Sforza, the Duke of Milan, reported that he had sent "Don Fernando, son of the Despot of the Morea, nephew of the lord Constantine [Arianiti, governor of Montferrat], to the Turk with five horses", possibly a diplomatic or espionage mission. This Fernando might have been another son of Andreas, and though Fernando actually adopted the title Despot of the Morea after Andreas's death, he appears to have made relatively little impact