Complex sentence: It was built in 1907, based on a project by French-born architect Édouard Le Monnier, for an insurance company called "Bola de Nieve"; at the time it was the tallest building in the city.
Split into simpler sentences: It was built in 1907, based on a project by French-born architect Édouard Le Monnier, for an insurance company called Bola de Nieve. At the time it was the tallest building in the city.