City history
Explore the rich maritime history, colonial architecture, and enduring culture of San Juan, the vibrant capital of Puerto Rico.
Chapter one
Earliest documented name
"Saint John"
The specific indigenous name for this settlement site is not reliably documented in historical records. San Juan is the earliest documented name, established during the Spanish colonial era.
Saint John
Named in honor of Saint John the Baptist.
Chapter two
Puerto Rico ceased the observance of daylight saving time, remaining on Atlantic Standard Time year-round.
The transition from local solar time to standardized Atlantic Standard Time helped synchronize maritime activities and commerce.
Chapter three
The permanent Spanish settlement was established, marking the beginning of the city's colonial history.
Work began on the Castillo San Felipe del Morro to protect the harbor from maritime invaders.
San Juan transitioned from Spanish colonial rule to United States administration following the war.