Álvaro de Bazán, 1st Marquis of Santa Cruz, Spanish admiral (died 1588)

Álvaro de Bazán y Guzmán, 1st Marquis of Santa Cruz, was a Spanish admiral and landlord. He took part, among others, in the seizure of the rock of Vélez de la Gomera (1564), the relief to the besieged during the Great Siege of Malta (1565), the quelling of the Alpujarras Rebellion (1569), the Battle of Lepanto (1571), the conquest of Tunis (1573), the incorporation of Portugal to the Spanish monarchy (1580), and the conquest of Terceira (1582).

December 12 is the 346th day of the year in the Gregorian calendar; 19 days remain until the end of the year.