| Office: | Minister of the Paraguayan Supreme Court of Justice |
| Term Start: | 1938 |
| Term End: | 1940 |
| Office2: | Minister of Foreign Affairs of Paraguay |
| Term Start2: | 1956 |
| Term End2: | 1976 |
| Predecessor2: | Hipólito Sánchez Quell |
| Successor2: | Alberto Nogues |
| Office3: | Senator of Paraguay |
| Term Start3: | 1976 |
| Term End3: | 1989 |
| Branch: | Paraguayan Army |
| Rank: | 1st Lieutenant |
| Battles: | Chaco War |
| Birth Date: | 1908 10, df=yes |
| Birth Place: | Asunción, Paraguay |
| Death Place: | Asunción, Paraguay |
| Spouse: | Juana Brugada Montero |
| Parents: | Francisco Sapena y Pastor Josephine Guérìn Mertens |
| Children: |
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Raul Sapena Pastor Guérin (9 October 1908 – 15 June 1989) was a Paraguayan lawyer, diplomat, professor and judge who served as foreign minister of the Republic of Paraguay from 1956 to 1976.[1]
He was the youngest of 9 children. His parents were Francisco Sapena y Pastor, a Spanish immigrant, and Josephine Guérìn Mertens, a French immigrant.[2] Near the end of the Chaco War, he married Juana Brugada Montero,[3] with whom he lived all his life and had 4 children: Graciela Josefina, Raúl Ricardo, Rubén Adolfo and Gloria Susana.
He began his studies at the Normal School of Asunción. In 1924 he completed his secondary studies obtaining a Bachelor's Degree in Sciences and Letters, along with a medal for being the best graduate of his class at the Colegio de San José de Asunción.
He continued his studies at the Universidad Nacional de Asunción, obtaining the title of Doctor of Law and Social Sciences; during his studies he was also president of the Law Students Center. Later on his life he would also obtain an honorary degree from the University of Rio de Janeiro in Brazil.
A few years after his graduation, the Chaco War began, and Raúl volunteered for service, becoming an officer in the Paraguayan Army with the rank of lieutenant.
He first worked as a teacher at the Goethe, and National schools in Asunción. At the same time he taught Political Economy, Private International Law, Consular Legislation and Public International Law at the Faculty of Law and Social Sciences of the Universidad Nacional de Asunción. At the War College, he was a professor of Public International Law.
He was president of the Banco de la República del Paraguay (today split into the Central Bank of Paraguay and the), and Ambassador in Argentina and Brazil. He was named Minister of Foreign Affairs when he was 48, and he held the position for a record 20 years; afterwards he resigned and assumed a seat in the Senate. He was elected Senator of the Republic of Paraguay for three terms: 1973-78, 1978–83, 1983-89. He held his seat in the Senate of the Republic until his death.[4]
It also has important international law books that have been used in various universities throughout Latin America.
Throughout his long career Raúl also held judicial positions, over time being a district judge in Paraguay's Criminal, Civil and Commercial courts, State attorney general, president of the Civil Court of Appeals and Commerce, and finally a minister of the Supreme Court of Justice of Paraguay between 1938 and 1940.
His work at the Paraguayan Chancellery can be divided into 2 sections. One prior to the arrival of Gral. Alfredo Stroessner to the presidency of Paraguay, and the other during his presidency in Paraguay, and the installation of the dictatorship. At that point, he resigned from office.
He died in Asunción, Paraguay, on 15 June 1989. The then President of the Republic, Andrés Rodríguez Pedotti and the Congress of the Republic decided that his burial was to be carried out with the military honors corresponding a Division General, for the high services rendered to the homeland.