The Cheong Fatt Tze Mansion, often referred to as the "Blue Mansion" due to its distinctive indigo-blue color, is a historic building located in George Town, Penang, Malaysia. It was built by Cheong Fatt Tze, a prominent Chinese merchant, and politician, in the late 19th century.

Born in Guangdong, China, in 1840, Cheong Fatt Tze was a self-made tycoon who established his fortune through various business ventures in Southeast Asia. He was known as the "Rockefeller of the East" and served as a diplomat for the Qing Dynasty.

The mansion was constructed in the 1880s and completed in 1904. It served as Cheong Fatt Tze's private residence and as the seat of his business empire. The mansion is an outstanding example of the architectural style known as Straits Eclectic, which combines Eastern and Western design elements. It features Chinese porcelain work, Gothic louvered windows, Stoke-on-Trent floor tiles, and Glasgow cast iron works. The mansion includes 38 rooms, 5 courtyards, 7 staircases, and 220 windows. The central courtyard, with its traditional Chinese air well, provides ventilation and natural light. The mansion was built using lime plaster mixed with natural blue dye from the indigo plant, giving it its iconic blue hue.