The St Charles's Church (Karlskirche) on Karlsplatz is arguably the loveliest baroque church with a large cupola in Vienna. I particularly liked the two huge spiral columns and both are inspired by Trajan's Column in Rome. The triangle pediment and columns of the front porch are designed after the Rome’s Pantheon.
This is one of my favourite shots. I find the Austrian Parliament building particularly fascinating. The style of architecture is Greek, decorated with sculptures of Greek and Roman historians and scholars and the pediments are one of the most amazing ornamental triangles I've ever seen in Europe. I like the exquisite details. Isn't it grand? If you look closely, there are small triangles on each side of the building too.