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The Spanish Habsburgs
![The ancestry of Charles II of Spain (1661-1700); source: Wikimedia](../../../../../../../../../figures.boundless-cdn.com/33228/full/iasaajncql6vyw0cpwgu.jpg)
The ancestry of Charles II of Spain (1661-1700); source: Wikimedia
The Spanish branch of the Habsburg royal family was noted for extreme consanguinity. Well aware that they owed their power to fortunate marriages, they married between themselves to protect their gains.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Carlos_segundo80.png."
https://commons.wikimedia.org/wiki/File:Carlos_segundo80.png
Wikipedia
Public domain.