The statue of the pregnant Virgin Mary (locally known as Nuestra Señora de la O) is said to be a gift from King Carlos III of Spain.

In 1611, a stone church and convent was built under the direction of Father Gonzalo del Roble.

Restoration of the church's woodwork and improvement of the convent was done by Father Lucas Fernandez in 1711.

Numerous stories of miracles and help from the patrons are recounted by devotees, especially in aiding mothers in labor, infants, and young children.

The Holy Scriptures also describe the stirring of two unborn children in the wombs—Jesus in Mary’s and John the Baptist in Elizabeth’s.

What you see is a divine mystery.” Additionally, on that day, choir clerics would chant a prolonged “O” after Vespers to symbolize the world’s yearning for the coming of the Redeemer.

Each morning during the octave, a High Mass is celebrated early, and it is customary for expectant mothers, regardless of status, to attend, honoring Our Lady’s motherhood and seeking her blessing.

[5] The images of the Virgin and the Holy Child of the O were believed to be a gifts from King Charles III of Spain to the town of Pangil.

The images were transferred to a vessel that traveled from Manila Bay, through the Pasig River, and finally reached Laguna Lake.

They were received at the lakeside in Estaca by locals who, perhaps due to a sudden rain, wore cloths tied around their heads.

Witnesses claimed to have seen a tall woman bathing at the head of the Pangil River.