Introduction to the Stock Exchange Palace: The Porto Stock Exchange Palace (Palácio da Bolsa) is a historic stock trading market in the old city and one of the founders of the European Historical Conference Center Association. This neoclassical building has beautiful interior decoration, integrating early styles from many countries, and is a model of iron frame architecture. Especially the Arabian Hall and the Hall of All Nations are very luxurious. Today, as an important cultural center and VIP conference center in Porto, it has received many important heads of state and held many large-scale concerts. It is one of the world heritage sites.