The Sans-Souci Palace, also known as the Sans-Souci Royal Palace, is a former royal palace located in Milot, Haiti. It was built in the early 19th century by King Henri I, also known as Henri Christophe, who ruled Haiti as king from 1811 to 1820. The palace was a symbol of King Henri's power and wealth, and was considered one of the most magnificent structures in Haiti during that time.

The Sans-Souci Palace was designed in the neoclassical style, with a mix of Greek and Roman architectural elements. The palace was built on a hillside and consisted of several buildings, including a main building, several smaller buildings, and a terrace with a view of the surrounding mountains and countryside. The interior of the palace was richly decorated with ornate frescoes, murals, and chandeliers.

In 1820, King Henri was overthrown and the palace was damaged in the subsequent political unrest. Over the years, the palace continued to deteriorate and was eventually abandoned. In the late 20th century, efforts were made to restore the palace, and it is now a popular tourist attraction in Haiti, attracting visitors from around the world who come to admire its historical significance and architectural beauty.

Today, the Sans-Souci Palace is part of the larger Citadelle Laferrière, a UNESCO World Heritage Site that includes several historic fortifications in Haiti. The palace is open to the public and is considered a must-see attraction for anyone visiting Haiti.