The hidden fortune of Medina Sidonia: wealth that surpassed that of the Spanish crown.

The House of Medina Sidonia, a prominent noble lineage in Spanish history, reached great splendor in the 16th and 17th centuries, amassing a fortune that, according to some chroniclers, surpassed that of the Spanish crown. Founded in the 14th century by Alonso Pérez de Guzmán, the house prospered especially after its elevation to dukedom in 1484, benefiting from trade with the New World. Their wealth, derived from properties in Andalusia and America, enabled them to build impressive palaces, symbolizing their power.

December 8, 2025

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The Hidden Fortune of Medina Sidonia: Wealth that Surpassed that of the Spanish Crown

In the shadows of Spanish history, the nobility has left indelible marks of grandeur and decline. Among them, the House of Medina Sidonia stands out, a lineage whose brilliance in the court and in the economy of the 16th and 17th centuries was so dazzling that, according to some chroniclers, their fortune even surpassed that of the Spanish crown itself. As we explore this dynasty, we uncover a world of hidden riches, excessive extravagance, and a story that, shrouded in rumors and legends, reveals both the splendor and the inevitable ruin of one of the most powerful lineages in the Iberian Peninsula.

The Origins of Grandeur: A Legendary Noble Lineage

The history of the House of Medina Sidonia dates back to the 14th century, when the first Duke of Medina Sidonia, Alonso Pérez de Guzmán, was ennobled for his bravery and loyalty to the Crown. His legacy spanned generations, becoming a symbol of wealth and power. Beginning in 1484, with the rise of the House to dukedom, they began to accumulate extraordinary wealth, particularly due to trade with the New World. It is said that by the 1570s, the family possessed a fortune estimated at over 120 million maravedíes, an amount greater than that of many European kings of the time.

Documents from the period, such as records from the Royal Treasury, attest that the Medina Sidonia had access to properties in Andalusia and the Canary Islands, in addition to holdings in America. In fact, a considerable part of their wealth came from sugar production on the plantations in Hispaniola, where their influence was hegemonic. This prosperity allowed them to build magnificent palaces, such as the Palace of the Dukes of Medina Sidonia in Sanlúcar de Barrameda, a symbol of their power and wealth.

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