Archduchess Maria of Austria (21 June 1528 – 26 February 1603) was the empress consort and queen consort of Maximilian II, Holy Roman Emperor, King of Bohemia and Hungary. She served as regent of Spain in the absence of her father Emperor Charles V from 1548 until 1551.
Her granddaughter Maria Theresa of Naples and Sicily became Holy Roman Empress as well in 1792. The Imperial and Royal Navy ship SMS Kaiserin und Königin Maria Theresia was laid down in 1891. The Military Order of Maria Theresa was founded by her in 1757 and remained in existence until after World War I.