Pedro de Aycinena y Piñol (19 October 1802 – 14 May 1897) was a conservative politician and member of the Aycinena clan that worked closely with the conservative regime of Rafael Carrera. He was interim president of Guatemala in 1865 after the death of president for life, general Rafael Carrera. Biography Aycinena y Piñol was the son of Vicente Aycinena, the second marquis of Aycinena, and was the younger brother of cleric Juan José de Aycinena y Piñol, who inherited the title. Pedro's uncle was Mariano de Aycinena y Piñol, also prominent member of the powerful family. Pedro married his first cousin, Dolores de Aycinena y Micheo, the daughter of a prominent member of the government of Ferdinand VII. Pedro served as Guatemalan minister of foreign relations (1854-71) and therefore played a major role in its foreign policy. Concordat of 1854 In 1854 a Concordat was established with the Holy See, which was signed in 1852 by Cardinal Antonelli, Secretary of State of the Vatican and Fernando Lorenzana plenipotentiary -Guatemala Ambassador before the Holy See. Through this treaty -which was designed by Aycinena clan leader, Dr. and clergyman Juan José de Aycinena y Piñol - Guatemala placed its people education under the control of Catholic Church regular orders, committed itself to respect Church property and monasteries, authorized mandatory tithing and allowed the bishops to censor whatever was published in the country; in return, Guatemala received blessings for members of the army, allowed those who had acquired the properties that the Liberals had expropriated the Church in 1829 to keep them, perceived taxes generated by the properties of the Church, and had the right, under Guatemalan law, to judge ecclesiastics who perpetrated certain crimes. The concordat was ratified by Pedro de Aycinena and Rafael Carrera in 1854 and kept a close relationship between Church and State in the country; it was in force until the fall of the conservative government of Marshal Vicente Cerna y Cerna. Wyke-Aycinena treaty: Limits convention about Belize The Belize region in the Yucatan peninsula was never occupied by either Spain or Guatemala, even though Spain made some exploratory expeditions in the 16th century that served as its basis to claim the area; Guatemala simply inherited that argument to claim the territory, even though it never sent any expedition to the area after the Independence from Spain in 1821, due to the Central American civil war that