Question: Juan de Cáceres y Ulloa was an organist of this cathedral, which is the main catholic church in which city?

Context paragraphs:
St. Dominic Cathedral, Moquegua: The St. Dominic Cathedral (Spanish: "Concatedral de Santo Domingo en Moquegua" ) Also Moquegua Cathedral Is the main Catholic temple in the city of Moquegua in the South American country of Peru.  It is a property of the Catholic Church.  It is located in the Plaza de armas de Moquegua.

El Duende: El Duende was a Dominican newspaper from Santo Domingo founded by José Núñez de Cáceres.  It was the second Dominican paper.  It printed its first issue just a few days after Núñez de Cáceres' second paper, El Telégrafo Continental de Santo Domingo, had appeared.  Both papers were the result of an increasing politicization among the Dominican "criollos" in Santo Domingo, who were at the time under the Spanish colonial government.  Political satire, opinions, and dialogue about the colony's relation with Spain were the main uses of this paper.  Though it lasted for only four months, it left a precedent that inspired similar contributions later in the 19th century.  Through it, Núñez de Cáceres developed himself as a fabulist, publishing stories he signed as "El Fabulista Principiante" (novice).

Albacete Cathedral: The Cathedral of San Juan de Albacete (Spanish: "Catedral de San Juan de Albacete" ) is a Roman Catholic church located in Albacete, Spain.  It was declared "Bien de Interés Cultural" in 1982.

Our Lady of the Assumption Cathedral, Tlaxcala: The Our Lady of the Assumption Cathedral (Spanish: "Catedral de Nuestra Señora de la Asunción" ) Also Tlaxcala de Xicohténcatl Cathedral Is the main Catholic church in the city of Tlaxcala, Mexico.  It was first known as the "Temple of St. Francis of Assisi" ("Templo de San Francisco de Asís"), however, when the Diocese began to rise, it was decided to name the cathedral and as it is commonly known; Dedicated as a cathedral under the invocation of Our Lady of the Assumption during the erection of the diocese of Tlaxcala.

Buenos Aires Metropolitan Cathedral: The Buenos Aires Metropolitan Cathedral (Spanish: Catedral Metropolitana de Buenos Aires ) is the main Catholic church in Buenos Aires, Argentina.  It is located in the city center, overlooking Plaza de Mayo, on the corner of San Martín and Rivadavia streets, in the San Nicolás neighbourhood.  It is the mother church of the Archdiocese of Buenos Aires and the primatial church of Argentina.

Juan de Cáceres y Ulloa: Juan de Cáceres y Ulloa (1618–1682) was a Spanish nobleman, organist of Buenos Aires Metropolitan Cathedral.  He was the first musician of the Río de la Plata, together with Juan Vizcaíno de Agüero.

Church of San Juan Bautista, Dalcahue: The Church of San Juan Bautista de San Juan de Coquihuil (Spanish: "Iglesia de San Juan Bautista de San Juan de Coquihuil" ) is a Roman Catholic church located in the Chilean hamlet of San Juan, commune of Dalcahue in Chiloé Island.  Commonly referred to as «Church of San Juan» —Spanish: "Iglesia de San Juan" —, is within the Diocese of Ancud; its construction was finished around 1887.

All Saints Cathedral, Santa Fe: The All Saints Cathedral (Spanish: "Catedral Metropolitana Todos los Santos de Santa Fe" ), also called Santa Fe Cathedral, is the main Catholic church and mother church of the Archdiocese of Santa Fe de la Vera Cruz.  It is located on the street Bigradier Estanislao Lopez in the city of Santa Fe, Santa Fe province, Argentina.

St. John the Baptist Cathedral, Iquitos: The St. John the Baptist Cathedral (Spanish: "Catedral San Juan Bautista, Catedral Metropolitana de Iquitos" ) also called Iquitos Cathedral is the main Catholic church in neo-Gothic style in the city of Iquitos in Peru, with an important value in the historic center of the town.  It is located specifically in Iquitos Center at the intersection of Arica and Putumayo streets, and is home of Bishop Miguel Olaortua Laspra.

Malpartida de Cáceres: Malpartida de Cáceres is a municipality in the province of Cáceres (Spain) with a population of 4368 inhabitants (population figures on 1 January 2004).  The urban centre of Malpartida de Cáceres is situated 11 kilometres west from Cáceres city.

Supporting paragraphs: Juan de Cáceres y Ulloa Buenos Aires Metropolitan Cathedral
Answer: Buenos Aires, Argentina