Sultan Syarif Ismail Abdul Jalil Jalaluddin Ismail.
Syarif Hashim Abdul Jalil Muzaffar Shah.
Syarif Abdurrahman Alkadri.
His son, Syarif Hashim Abdul Jalil Muzaffar Shah
was then raised to the throne during period 1889-1908.
The last Sultan of Siak was
Syarif Qasim Abdul Jalil Syaifuddin Syarif Qasim II, who was in throne in 1915-1949.
He was then followed by Sultan Syarif Ismail Abdul Jalil Jalaluddin Ismail
who took the reign during 1815-1854 which was given title Marhum Indrapura.
Legend has it that Syarif Abdurrahman Alkadri once fired a cannonball
to fight a disturbing female ghost, known here as“pontianak”- hence the name of the city.
In November 1945, Sultan Syarif Qasim II sent a cable to President of the Republic of
Indonesia declaring allegiance to the newly created Government of the Republic of Indonesia.
Six of their descendants from this marriage became Sultans, which was started since
the seventh Sultan of Siak Sri Indrapura hence their names prefixed with word Syarif or Sayyid.
At the beginning of the independence of Indonesia, Sultan Syarif Kasim II,
the Sultanate of Siak was the last state to join the kingdom of the Republic of Indonesia.
The palace contains royal ceremonial objects, such as a gold-plated crown set with diamonds,
a golden throne and personal objects of Sultan Syarif Qasyim and his wife,
such as the"Komet", a multi-centennial musical instrument which is said to have been made only two copies in the world.