The fortified structure built by King Henry VIII in England is the Tower of London. Originally founded as a royal palace after the Norman Conquest of England, it became a symbol of power and authority. Henry VIII expanded the Tower for his own use, turning it into a royal residence and securing it against potential uprisings. Additionally, it served various roles throughout history, including a fortress, prison, and treasury. Today, the Tower of London is recognized for its historical significance, housing the Crown Jewels and attracting millions of visitors annually as a UNESCO World Heritage Site.