Complex sentence: He was born in Paris, son of architect Louis-Pierre Baltard, and until 1833 studied at the "École des Beaux-Arts", where he garnered the Prix de Rome for designing a military school in 1833.
Split into simpler sentences: He was born in Paris, son of architect Louis-Pierre Baltard. Until 1833, Baltard studied at the "École des Beaux-Arts", where he garnered the Prix de Rome for designing a military school in 1833.