Cayetano Pignatelli, 3rd Marquis of Rubí

Cayetano Pignatelli, 3rd Marquis of Rubí, 9th Baron of Llinars, (12 October 1730 - ?), was a Spanish nobleman and military figure who played an important role in determining Spanish policy towards Texas and Mexico. He abandoned the east Texas colonies in the 18th century.

Rubí was born in Barcelona. He was the son of Francisco Pignatelli y de Aymerich, a lieutenant general of the Kingdom of Aragon and ambassador to France and María Francisca Rubí Corbera y Saint Climent, 2nd Marchioness of Rubí and Baronessa of Llinas. The marquis of Rubí was the nephew of the 6th Prince of Belmonte, Don (Giuseppe) Antonio Pignatelli y Aymerich, and of Doña Marianna, Countess of Althann, lady in waiting to Empress Elizabeth, consort of Emperor Charles VI and mother of Empress Maria Theresa.

Rubí, who had achieved the high rank of field marshal and knight commander in the Order of Alcántara, arrived at Veracruz on 1 November 1764, as part of the expedition of Juan de Villabla, who had been sent to New Spain to organize regular army and colonial militia units. On August 7 of the following year, King Charles III appointed Rubí inspector of frontier presidios and commissioned him to remedy economic abuses and other urgent matters. When notified of his commission, Rubí went to Mexico City in mid-December 1765, and remained in the capital until March 1766, when he received his instructions from Viceroy Cruillas.

In the latter half of the eighteenth century frontier conditions in northern New Spain had deteriorated to such an extent as a result of Indian depredations, management of presidios etc., that the Spanish crown found it necessary to order an examination of the entire frontier with the view of relocating presidios and making whatever other adjustments might be necessary to prevent further abandonment of the frontier settlements. The Marques de Rubi was given the assignment of investigating this problem. He began his investigation in 1766. Royal engineers Nicolas de La Fora and Joseph de Urrutia assisted Rubi by drawing plans of presidios and drafting maps of the area traversed.

On March 12 Rubí set out on his inspection, traveling first to Querétaro and then to Zacatecas. On April 14 he was joined at Durango by Nicolás de Lafora, his engineer and mapmaker, who kept a diary of the tour, as did Rubí himself. Rubí began his inspection tour in New Mexico, moved to Sonora, and then traveled eastward to Coahuila. He crossed the Rio Grande in July 1767 and proceeded to San Luis de las Amarillas Presidio (San Sabá) by way of the upper Nueces River, where he visited the largely failed missions at El Cañón. He left San Sabá on August 4 and reached San Antonio de Béxar on August 24, 1767. From San Antonio, Rubí traveled to Los Adaes and began his inspection there on September 14. Subsequently, he also inspected the presidios at El Orcoquisac and La Bahía before leaving Texas at Laredo in November 1767. In all, Rubí's inspection of the northern frontier from the Gulf of California to Louisiana occupied him for twenty-three months, during which he traveled an estimated 7,600 miles. Born on October 12, 1730

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