Great Seal of the Philippines

The Great Seal of the Philippines (Filipino: Dakilang Sagisag ng Pilipinas) is used to authenticate official documents of the government of the Philippines.

It may refer to the physical seal itself or the design impressed upon it. By law, the President of the Philippines is given the custody of the seal.

Design and usage
Republic Act No. 8491 specifies a Great Seal for the Republic of the Philippines:

The Great Seal shall be circular in form. with the same specifications with the national Coat of Arms, surrounding the arms is a double marginal circle which the official name of the Philippines in Filipino was inscribed in. the color of the arms shall not be deemed essential but tincture representation must be used. The Great Seal must also bear the national motto of the Philippines.

The Great Seal shall be affixed to or placed upon all commissions signed by the President and upon such other official documents and papers of the Republic of the Philippines as may be provided by law, or as may be required by custom and usage. The President shall have custody of the Great Seal.

Seals of the Philippine Revolutionary states
The First Philippine Republic featured a seal composed of an equilateral triangle with three stars representing Luzon, Visayas, and "Mindanao and Sulu" and an eight-rayed sun. There were several variations of the seal such as different arrangement of the stars and the presence or absence of a face on the sun. The Republic of Biak-na-Bato, and Malolos Republic also used seals.

American period
In 1903, a design by Melecio Figueroa, a Filipino engraver, for coinage was adopted for the design of the Great Seal under the United States-administered Insular Government. The seal featured Mayon Volcano and a Filipino woman in Filipiniana attire striking an anvil, surrounded by the text "United States of America, Government of the Philippine Islands". This seal has "never been legally adopted by the Philippine Commission" was supplanted by a design of John R.M. Taylor in 1905, when a new coat of arms was also adopted.

The seal was revised when the Philippine Commonwealth was established in 1935, and the new coat of arms was patterned after the Philippine flag. The seal was composed of the arms inscribed in a circle with the text "United States of America, Commonwealth of the Philippines". President Manuel L. Quezon adopted a new coat of arms and seal in through Executive Order No. 313 on December 23, 1940. The seal was not used despite its official adoption, and the Commonwealth reverted to the 1935 seal on February 23, 1941.

Second Philippine Republic
The Second Philippine Republic of 1943 to 1945, a puppet state of Imperial Japan, adopted a different seal in October 1943. President Jose P. Laurel issued Republic Act No. 5, which states that the design is a triangular emblem encircled by a double marginal circle. The law dictates the seal to be: The Great Seal of the Republic of the Philippines shall be circular in form with an equilateral triangle in the middle studded with three five-pointed stars in each corner and emblazoned at the 'center- with the eight-rayed sun, each ray flanked on both sides -by lesser and minor rays; the triangle to be enclosed by another equilateral triangle and between the lines of the two triangles there shall appear on the left side the word 'Kapayapaan,' on the right, 'Kalayaan,' and at the bottom 'Katarungan'; surrounding the whole a double marginal circle within which shall appear the words 'Republika ng Pilipinas' and the figures '1943'

Post–World War II
After the dissolution of the Philippine Commonwealth and the granting of the full independence of the Philippines by the United States in 1946, a new coat of arms was adopted along with a great seal. The seal was composed of the seal inscribed in a double marginal circle with the text "Republic of the Philippines". The seal had little revisions. In 1978, President Ferdinand Marcos, included the motto "Isang Bansa, Isang Diwa" (“One Nation, One Spirit”) and the inscription of the seal was in Filipino as "Republika ng Pilipinas, Opisyal na Tatak".