Blue tiles (Azulejos) on exterior of Chapel of Santa Catarina (Chapel of Souls), UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

blue tiles azulejos porto portugal religious art architecture heritage historic site southern europe cultural significance decorative arts intricate patterns spiritual imagery european landmarks local history chapel tilework visual storytelling exterior design historical architecture scenic views artistry cultural heritage craftsmanship ornamentation baroque style building facade religious architecture traditional art heritage conservation outdoor art urban landscape city views cultural exploration tourism spiritual site history travel destinations sightseeing travel attraction craftsmanship skills mosaic art architectural details visual arts iconic locations european history decorative tiles mural christ saints