The interiors of the Pena Palace were adapted to serve as the Summer residence of the royal family. It has amazing stuccos, painted walls in trompe-l'œil and various revetments in tile from the 19th century, forming part of the numerous royal collections.

The Pena Palace (Palácio Nacional da Pena) in Sintra, Portugal, was originally conceived as a summer residence for the Portuguese royal family. Built in the mid-19th century under the direction of King Ferdinand II, it served as a monumental expression of 19th-century Romanticism, intended to evoke a sense of national pride and artistic grandeur. Before its transformation into a palace, the site housed a small, quiet monastery; Ferdinand II purchased the ruins and surrounding lands to create a retreat that would be visible from any point in the lush gardens and forests below. Beyond its domestic use, the palace’s purpose was symbolic—blending Manueline, Moorish, and Renaissance styles to represent the diverse historical threads of the Portuguese identity. Today, as a UNESCO World Heritage site, its purpose has shifted to a national monument and museum, preserving the personal artifacts of the monarchy and serving as one of the most significant examples of architectural eclecticism in the world, attracting millions of visitors to witness its vibrant colors and historical interiors.