Complex sentence: His descendants were accepted as "princes étrangers" at the court of France, where some held prominent positions, eventually coming to reign as kings of Sardinia from 1831 to 1861 and as kings of Italy from 1861 until the dynasty's deposition in 1946.
Split into simpler sentences: His descendants were accepted as "princes étrangers" at the court of France, where some held prominent positions. They eventually came to reign as kings of Sardinia from 1831 to 1861, and as kings of Italy from 1861 until the dynasty's deposition in 1946.