Complex sentence: In the middle of the village was the intersection of eight streets, in what would become Niagara Square; several blocks to the southeast would be a semicircle fronting Main Street with an elongated park green, formerly his estate.
Split into simpler sentences: In the middle of the village was the intersection of eight streets, in what would become Niagara Square. Several blocks to the southeast he designed a semicircle fronting Main Street with an elongated park green, formerly his estate.