What famous church was built during Pope Sylvester I's pontificate?
St. Peter's Basilica
Hagia Sophia
Notre-Dame de Paris
Old St. Peter's Basilica
Answer
Old St. Peter's Basilica was built during Pope Sylvester I's pontificate. It was commissioned by Emperor Constantine I and was the first basilica built on the site where the current St. Peter's Basilica now stands in Vatican City.
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