Complex sentence: The Praça da Sé ("Sé Square") is a public space in São Paulo, considered as the geographic center of town, because is the point from where the distancy of all roads that pass on São Paulo are counted.
Split into simpler sentences: The Praça da Sé ("Sé Square") is a public space in São Paulo. Considered as the city's central point, it is the point from where the distancy of all roads passing through São Paulo are counted.