Saint Isidore Cemetery is a monumental cemetery in the Spanish capital Madrid. Its first courtyard was erected in 1811 and new expansions were added throughout the 19th Century. Its central courtyard, called "Patio de la Concepción" boasts a notable group of mausolea. This cemetery is the resting place of many famous Spaniards, including artists, politicians and poets.

Leonardo Torres Quevedo was a Spanish civil engineer, mathematician, and inventor of the late 19th century and early 20th century. A member of the Royal Spanish Academy since 1920, he was also a corresponding member of the French Academy of Sciences, among other institutions. Torres was a prolific and versatile innovator in various fields of engineering, including mechanics, aeronautics and automatics. One of his greatest achievements was El Ajedrecista of 1912, an electromagnetic device capable of playing a limited form of chess that demonstrated the capability of machines to be programmed to follow specified rules (heuristics) and marked the beginnings of research into the development of artificial intelligence.