Buenaventura de Abarzuza y Ferrer (c. 1843–1910) was a Spanish diplomat born in Havana in Cuba.
[1] Buenaventura de Abarzuza was ambassador to London in 1873 and member of the Partido Posibilista, which he left to join the royalists.
[2] He was Foreign Minister during the presidency of Práxedes Mateo Sagasta, and promoted a series of administrative reforms in order to attract moderate Cubans.
[3] In 1898 Buenaventura de Abarzuza was part of a delegation sent to negotiate the Treaty of Paris after the Cuban war.
[4] Buenaventura de Abarzuza wrote in the "La Democracia" newspaper, owned by his friend Castelar's.