Philippine Welser in the context of Morganatic

Welser was a German banking and merchant family, originally a patrician family based in Augsburg and Nuremberg, that rose to great prominence in international high finance in the 16th century as bankers to the Habsburgs and financiers of Charles V, Holy Roman Emperor. Along with the Fugger family, the Welser family controlled large sectors of the European economy, and accumulated enormous wealth through trade and the German colonization of the Americas, including slave trade. The family received colonial rights of the Province of Venezuela from Charles V, who was also King of Spain, in 1528, becoming owners and rulers of the South American colony of Klein-Venedig (within modern Venezuela), but were deprived of their rule in 1546. Philippine Welser (1527–1580), famed for both her learning and her beauty, was married to Archduke Ferdinand, Emperor Ferdinand I's son.

Claiming descent from the Byzantine general Belisarius, the family is known since the 13th century. By the early Age of Discovery, the Welser family had established trading posts in Antwerp, Lyon, Madrid, Nuremberg, Sevilla, Lisbon, Venice, Rome, and Santo Domingo. The Welsers financed not only the Emperor, but also other European monarchs. After the Reformation, both Welser and Fugger families remained in the Roman Catholic Church.

Ferdinand II, Archduke of Austria (14 June 1529 – 24 January 1595) was ruler of Further Austria and Imperial Count of Tyrol since 1564. The son of Ferdinand I, Holy Roman Emperor, he first married Philippine Welser, and later Anna Caterina Gonzaga. Through his second marriage he was the father of Anna of Tyrol, the future Holy Roman Empress.