Ilocos Sur Provincial Library

Gregoria M. Rivera Memorial Library, commonly known as Ilocos Sur Provincial Library, is a public library in Vigan, Ilocos Sur, Philippines.

History
Before becoming a library, its building served as Vigan's jail in 1657, and became Ilocos Sur's provincial jail complex in 1855.

In 1890, Philippine president Elpidio Quirino was born inside the jail complex when his father served as jail warden. In 1948, a section of the jail complex was converted into a provincial library, and named after Quirino's mother, Gregoria Rivera.

Recognition
The Philippines Historical Committee, a predecessor of the National Historical Commission of the Philippines, installed a historical marker in 1949.