Library of Congress
Loc: Puerto Rico at Dawn of the Modern Age
This site provides a collection that portrays the early history of the commonwealth of Puerto Rico through first-person accounts, political writings, and histories drawn from the Library of Congress.
Other
Indian Pueblo Cultural Center
Not exclusive to pre-contact, this site has an extensive collection of resources that describe many facets of various Pueblo cultures.
Patrick McSherry
Spanish American War Centennial: Puerto Rican Naval Campaign, 1898
A wealth of information regarding Puerto Rico during the Spanish-American War. You will find info on their army, navy, infantry and some first hand accounts.
Curated OER
Spanish Built Fortifications, Old San Juan
Spanish-built fortifications, Old San Juan, Puerto Rico.