Question: What museum is now housed in the palace built by Nguyễn An and others in the 15th century?
Context: The Mohamed Mahmoud Khalil Museum is a museum in Greater Cairo, in the Giza area, Egypt.  It is located in a palace built in the early 20th century. Princessehof Ceramics Museum (in Dutch: Keramiekmuseum Princessehof) is a city museum of ceramics in Leeuwarden, The Netherlands.  The museum's name comes from one of two buildings in which it is housed: a small palace built in 1693 and later occupied by Marie Louise, dowager Princess of Orange.  The other annexed building is the "Papinga" stins, a former stronghold from the 15th century.  The museum is of interest for its buildings, but also for its collection of tiles, pottery, and ceramic sculpture. The Palace of the Dukes and Estates of Burgundy or "Palais des ducs et des États de Bourgogne" is a remarkably well-preserved architectural assemblage in Dijon.  The oldest part is the 14th and 15th century Gothic ducal palace and seat of the Dukes of Burgundy, made up of a logis still visible on place de la Liberation, the ducal kitchens on cour de Bar, the tour de Philippe le Bon, a "guette" overlooking the whole city, and tour de Bar.  Most of what can be seen today, however, was built in the 17th and especially the 18th centuries, in a classical style, when the palace was a royal residence building and housed the estates of Burgundy.  Finally, the 19th façade of the musée on place de la Sainte-Chapelle was added on the site of the palace's Sainte-Chapelle, demolished in 1802.  The Palace houses the city's town hall and the musée des Beaux-Arts. The Forbidden City was the Chinese imperial palace from the Ming dynasty to the end of the Qing dynasty—the years 1420 to 1912.  It is in the center of Beijing, China, and now houses the Palace Museum.  It served as the home of emperors and their households as well as the ceremonial and political center of Chinese government for almost 500 years. The Aljafería Palace (Spanish: "Palacio de la Aljafería" ; Arabic: قصر الجعفرية‎ ‎ , tr.  "Qasr al-Jaʿfariya") is a fortified medieval Islamic palace built during the second half of the 11th century in the Taifa of Zaragoza of Al-Andalus, present day Zaragoza, Aragon, Spain.  It was the residence of the Banu Hud dynasty during the era of Abu Jaffar Al-Muqtadir after abolishing Banu Tujibi of Kindah dynasty.  The palace reflects the splendor attained by the kingdom of the taifa of Zaragoza at the height of its grandeur.  The palace currently contains the Cortes (regional parliament) of the autonomous community of Aragon. Kadriorg Palace (Estonian: "Kadrioru loss" , German: "Schloss Katharinental" ) is a Petrine Baroque palace built for Catherine I of Russia by Peter the Great in Tallinn, Estonia.  Both the Estonian and the German name for the palace means "Catherine's valley".  It was built after the Great Northern War to Nicola Michetti's designs by Gaetano Chiaveri and Mikhail Zemtsov.  The palace currently houses the Kadriorg Art Museum, a branch of the Art Museum of Estonia, displaying foreign art from the 16th to 20th centuries.  The KUMU branch of the museum, showing Estonian art from the 18th century onwards is furthermore situated in the park. Jinjira Palace also known as Qasr-i-Jazirah (palace of the island), is a palace built by the Mughal governor, Ibrahim Khan II, in the late 17th century in Bengal, on the banks of the Old Ganges river. The Palazzo Filangeri-Cutò was a palace built in the 17th century by the Corberas, a noble family of Spanish origin, in the small Sicilian town of Santa Margherita di Belice.  The palace provided the setting for Giuseppe Tomasi di Lampedusa's celebrated novel "The Leopard", which traced the evolution of Sicilian aristocracy in the 19th century. Diocletian's Palace (Croatian: "Dioklecijanova palača" , ] ) is an ancient palace built for the Roman Emperor Diocletian at the turn of the fourth century AD, that today forms about half the old town of Split, Croatia.  While it is referred to as a "palace" because of its intended use as the retirement residence of Diocletian, the term can be misleading as the structure is massive and more resembles a large fortress: about half of it was for Diocletian's personal use, and the rest housed the military garrison. Nguyễn An (Sino-Vietnamese 阮安; died 1453), known in Chinese as Ruan An (pinyin) or Juan An (Wade-Giles), was a Ming dynasty eunuch, architect, and hydraulics specialist between the first and fifth decades of the 15th century.  Born in Vietnam, he was taken as tribute from Vietnam to China and later became a eunuch and architect in service to the Chinese emperors.  He, along with numerous architects, such as master designers and planners Cai Xin (蔡信), Chen Gui (陳珪), and Wu Zhong (吳中), master carpenter Kuai Xiang (蒯祥), and master mason Lu Xiang (陸祥), was an important builder of the Forbidden City in Beijing.
Answer: Palace Museum