Olinda has, not to write is, one of the most beautiful historic city centers of Brazil. Having said this, it is important to note that “historic city center” has a slightly different meaning in Brazil.
In many cities, the sign centro historico might very well mean that once there was one (Maceió), that there are a handful of nicely restored buildings scattered across an otherwise unremarkable area (Natal) or that there is indeed one, despite modernization efforts, though it really could do with some maintenance (Recife).
This makes Olinda with its colourful houses and restored churches even more worth-while visiting. Only reminding slightly of most European historic city centres: no matter how well maintained and beautiful, after one day max., you’ve seen it all.