Carlos II, known as 'El Hechizado' or 'The Bewitched', was the last Habsburg king of Spain, reigning from 1665 until his death in 1700. His reign is marked by a series of personal and political struggles, largely attributed to the effects of inbreeding within the Habsburg dynasty, which led to significant health problems and a lack of viable heirs. His condition and the instability of his rule had profound effects on the Spanish monarchy and its families.