Question: Which architect was responsible for designing the building standing on the original site of a Spanish explorer, conquistador, and first Governor of Puerto Rico?

Context paragraphs:
Puerto Rican citizenship: Puerto Rican citizenship was first legislated by the United States Congress in Article 7 of the Foraker Act of 1900 and later recognized in the Constitution of Puerto Rico.  Puerto Rican citizenship existed before the U.S. takeover of the islands of Puerto Rico and continued afterwards.  Its affirmative standing was also recognized before and after the creation of the Commonwealth of Puerto Rico in 1952.  Puerto Rican citizenship was recognized by the United States Congress in the early twentieth century and continues unchanged after the creation of the Commonwealth of Puerto Rico.  The United States government also continues to recognize a Puerto Rican nationality.  Puerto Rican citizenship is also recognized by the Spanish Government, which recognizes Puerto Ricans as a people with Puerto Rican, and not "American" citizenship.  It also grants Spanish citizenship to Puerto Ricans on the basis of their Puerto Rican, not American, citizenship.

Puerto Rican Figure Skating Championships: The Puerto Rican Figure Skating Championships are the figure skating national championships held annually to crown the national champions of Puerto Rico.  Skaters compete in the disciplines of men's singles and ladies singles across the levels of senior (Olympic-level), junior, novice, intermediate, and juvenile.  Not every event has been held in every year due to a lack of entries.  The National Championships are organized by the Puerto Rican Figure Skating Federation.  The Puerto Rican Figure Skating Federation is not affiliated with the Puerto Rico Olympic Committee (In Spanish, Comite Olimpico de Puerto Rico), and therefore can not represent Puerto Rico internationally or compete in the Winter Olympic Games.  Although the Puerto Rican Figure Skating Federation became a member of the International Skating Union, the Puerto Rico Olympic Committee has not recognized it, nor is listed in the Puerto Rico Olympic Committee website.  The Puerto Rican Figure Skating Federation is essentially a club seeking recognition by the Puerto Rico Olympic Committee.  Created and formed by the family of the first Puerto Rican figure skater Kristine Stone Cruz (who trained in the Ice House in Hackensack New Jersey).  She held the title 2 years in a row.  Kristine is now coaching as well as skating in Omaha, Nebraska at the Ralston Arena.

2013 Puerto Rico teachers protest: The 2013 Puerto Rico teachers protest is an ongoing protest staged by the teachers of Puerto Rico's public school system which began on December 19, 2013.  During the protest, teachers from the Puerto Rico Teachers Federation took over the floor of the Senate of Puerto Rico with the intention of halting an extraordinary session called by Governor Alejandro García Padilla.  Padilla was going to order a reform of the Puerto Rico Teachers Pension System.  The Sergeant-at-Arms of the Senate of Puerto Rico stated he could not guarantee the safety of those in the hemicycle of the Capitol of Puerto Rico that houses the Senate.  Both the Governor and the President of the Senate of Puerto Rico, Eduardo Bhatia, asked the Puerto Rico Joint Forces of Rapid Action (FURA) and the Puerto Rico Police to not intervene nor attempt to remove the protesters.

Military of Puerto Rico: The military defense of Puerto Rico is the responsibility of the United States as part of the Treaty of Paris.  Locally, Puerto Rico has its own National Guard, the Puerto Rico National Guard, and its own state defense force, the Puerto Rico State Guard, which, by local law, is under the authority of the Puerto Rico National Guard.  The commander-in-chief of both forces is the governor of Puerto Rico, currently Ricky Rosselló, who delegates his authority to the Puerto Rico Adjutant General, currently Brigadier General Isabelo Rivera The Adjutant General, in turn, delegates the authority over the State Guard to another officer but retains the authority over the Puerto Rico National Guard as a whole.  At the national level, the commander-in-chief is the President of the United States, currently Donald Trump.

Puerto Rico Adjutant General: The Puerto Rico Adjutant General (Spanish: "Ayudante General de Puerto Rico" ) is the Commander of the Puerto Rico National Guard.  As the Adjutant General he is also the Senior Military Advisor to the Governor of Puerto Rico and oversees both State and Federal Missions of the Puerto Rico National Guard.  He provides leadership and management in the implementation of all programs and policies affecting more than 10,500 citizen-soldiers and airmen, and civilian employees of the three components of the PR National Guard: Puerto Rico Army National Guard, Puerto Rico Air National Guard and Puerto Rico State Guard.  It is the responsibility of the Adjutant General of the Commonwealth to share his reports with the Secretary of the Army or the Secretary of the Air Force.

Marcos Rodriguez Ema: After graduating with honors from Georgetown University’s School of Foreign Service and completing his juris doctor degree at Georgetown University Law Center in Washington, D.C., Mr. Rodríguez-Ema returned to Puerto Rico to work as an associate in the corporate and banking division of a major law firm in San Juan.  He concentrated and focused his early legal career on the legal aspects of complex financial transactions for the law firm’s banking clients.  He was later recruited by Drexel Burnham Lambert-Puerto Rico as a Vice President, later Senior Vice President, of their Corporate and Municipal Finance division.  He was responsible for structuring and executing a variety of bond and note issues for the Government of Puerto Rico, its several dependencies, as well as for Drexel’s private clients.  In 1989 Mr. Rodríguez-Ema was recruited by Chase Manhattan Bank in Puerto Rico to manage the investment banking unit of its Chase Securities Puerto Rico subsidiary, thus becoming a member of Chase’s Management Committee in Puerto Rico.  After the November 1992 election, the governor-elect of Puerto Rico asked him to join his fiscal and financial team as President of the Government Development Bank for Puerto Rico (GDB).  The GDB (www.gdb-pur.com) is the bank and fiscal agent for the government of Puerto Rico.  As such, it is chartered with the coordination, structure, execution and placement of every single financing, bond or note issue for all government agencies, government-owned corporations and its multiple dependencies, including all 78 municipalities throughout Puerto Rico.

Puerto Rico Medical Emergencies Corps: The Puerto Rico Emergency Medical Corps Spanish: "Cuerpo de Emergencias Médicas de Puerto Rico" (CEMPR) or "Emergencias Médicas Estatal" because of the word "Estatal" on their ambulances is the agency of the executive branch of the government of Puerto Rico that responds to all medical emergencies within the jurisdiction of Puerto Rico.  The agency is assigned to the Department of Health of Puerto Rico, and is a component of the Puerto Rico Public Security Commission which also includes the Puerto Rico Police and the Puerto Rico Firefighters Corps.  The Corps divides Puerto Rico in six regions for operational purposes with each region having its own dispatch.  The Corps is directed by Abner Gomez Cortes,MBA.

Puerto Rico Army National Guard: The Puerto Rico Army National Guard (PRARNG) — better known in Spanish as "Ejército de la Guardia Nacional de Puerto Rico" but officially designated as "Guardia Nacional Terrestre de Puerto Rico" — is the Army National Guard of Puerto Rico which, together with the Puerto Rico Air National Guard, comprises the Puerto Rico National Guard.  PRARNG is the ground-component of the Puerto Rico National Guard under control of the governor of Puerto Rico, currently Ricardo Roselló , that performs missions equivalent to those of the Army National Guards of the different states of the United States, including ground defense, disaster relief, and control of civil unrest.

Juan Ponce de León: Juan Ponce de León (] ; 1474 – July 1521) was a Spanish explorer and "conquistador".  He became the first Governor of Puerto Rico by appointment of the Spanish crown.  He led the first known European expedition to "La Florida", which he named during his first voyage to the area in 1513.  Though in popular culture, he was supposedly searching for the Fountain of Youth, there is no contemporary evidence to support the story, which is likely a myth.

Anson Mills Building: The Anson Mills Building is a historic building located at 303 North Oregon Street in El Paso, Texas.  The Building stands on the original site of the 1832 Ponce de León ranch.  Anson Mills hired Henry C. Trost of the Trost & Trost architectural firm to design and construct the building.  Trost was the area's foremost pioneer in the use of reinforced concrete.  Built in 1910-1911, the building was only the second concrete-frame skyscraper in the United States and one of the largest all-concrete buildings.  At 145 feet (44 m), the 12-story Mills Building was the tallest building in El Paso when completed.  The architectural firm of Trost and Trost moved its offices to the building upon completion, where they remained until 1920.  The Mills family sold the building in 1965.  The building stands on a corner site opposite San Jacinto Plaza, with a gracefully curved street facade that wraps around the south and east sides.  Like many of Trost's designs, the Anson Mills Building's overall form and strong verticality, as well as details of the ornamentation and cornice, are reminiscent of the Chicago School work of Louis Sullivan.

Supporting paragraphs: Anson Mills Building Juan Ponce de León
Answer: Henry C. Trost