The H.H. Uthradom Thirunal Marthanda Varma Chithralayam, also known as Chitralayam Palace Museum, is an art gallery which exhibits the history and genealogy of the Maharajas of Travancore. The development of Travancore as a state is portrayed through the pictures which are exhibited in the museum. The two-storied building, which was once a part of the Royal Residence, has now been converted into an art gallery. It has a collection of paintings and pictures donated by the royal family; these pictures illustrate the lives of the rulers from their childhood days to the days of their coronation, marriage, and rule. Photographs of visits from British officials during the British rule and the rulers' meetings with them have also been added to the museum.

Special emphasis has been given to the last ruling monarch of Travancore, Sree Chithira Thirunal Balarama Varma, whose life has been recorded through photographs. Almost an entire section of the upper level has been turned around to display his life and times; while the lower level has multiple picture galleries portraying the state under the British Rule, the important palaces of the royal family, the Padmanabhaswamy Temple, and the family temple of the royal family. There is also a section dedicated to anamorphic paintings, which were added in 2017 and soon became the highlight of the museum. This section contains most of the major rulers of Travancore along with people like Raja Ravi Varma, who was also a part of the royal family.