The people of Bohol are said to be the descendants of the last group of inhabitants who settled in the Philippines called pintados or “tattooed ones.” Boholanos already had a culture of their own as evidenced by the artifacts dug at Mansasa, Tagbilaran, and in Dauis and Panglao.
Bohol
is derived from the word Bo-ho or Bo-ol. The island was the seat of the
first international treaty of peace and unity between the native king
Datu Sikatuna, and Spanish conquistador, Miguel López de Legazpi, on
March 16, 1565 through a blood compact alliance known today by many
Filipinos as the Sandugo. Below is the shrine of blood compact event.

The Sandugo was a blood compact, performed in the island of Bohol in the Philippines, between the Spanish explorer Miguel López de Legazpi and Datu Sikatuna the chieftain of Bohol on March 16, 1565, to seal their friendship as part of the tribal tradition. This is considered as the first treaty of friendship between the Spaniards and Filipinos. "Sandugo" is a Visayan word which means "one blood".
As it celebrates the 420th anniversary of blood compact, First Day Cover is issued to commemorate the event. I've purchased the said cover at P42.00 from local seller online, I value it since it also depicts Philippine history.
Mabuhay ang Pinoy.