The Sixtine Chapel in Madrid

One of the best kept secrets in Madrid is this church. Most Spanish people, let alone Madrid citizens, don't know that this church exists. It's largely overlooked by tourists, although it's really close to Gran Vía.

On the outside it's very austere, almost incospicuous. I discovered it while my daughter was shopping for comics and manga.

But on the inside, it leaves you breathless. According to history, it was built in 1603 by Phillip III to house Portuguese warriors since Portugal at that time was part of Spain. Later on, its name changes since the monarchy changed. Either way, it's another example of the secrets Madrid has for those that want to discover them.