Fortifications in Veritas et Fortitudo are of two kinds. There are traditional fort buildings like in vanilla EU and there are local fortifications that appear in many provinces until the 16th century.
These buildings represent fortified towns and smaller castles that, until the advent of strong artillery, required the investment of siege or assault to secure. They are found in most provinces in Europe, North Africa, the Middle East, north-east India, China, and Japan. These fortifications will disappear in the early 16th century as artillery becomes more advanced and their usefulness evaporates. Local fortifications can be destroyed ruing a siege; when so destroyed the owner can pay to rebuild them or wait until the local inhabitants (noble or citizen) do it themselves though this option may take several years.