Complex sentence: The First Unitarian Church of Detroit is a Romanesque Revival-style church built of red sandstone; although somewhat remodelled during the 1936 widening of Woodward, it remains substantially as built.
Split into simpler sentences: The First Unitarian Church of Detroit was a Romanesque Revival-style church built of red sandstone. After its remodelling during the 1936 widening of Woodward, it remained substantially as built.