The Church of St. John of Nepomuk in Munich, built in the 18th century by the Asam brothers. The Asam brothers, who were both architects as well as artists, originally built the church as their private chapel, but the public insisted it be opened for all to see. The frescoes were created using quadratura, a technique that uses perspective and "deceive the eye" to create the illusion of three-dimensional space on a flat surface. This makes the church's barrel-vaulted ceiling appear to open up into the heavens. Just look at this work of art. Yes a bit dark and creepy! And they used to be able to build like this!