Mercado, Old San Juan
subbarrio in San Juan Antiguo, San Juan, Puerto Rico
Mercado is one of 7 subbarrios of the San Juan Antiguo barrio in the municipality of San Juan in Puerto Rico. Mercado (Spanish for 'marketplace) is named after Old San Juan's main marketplace, which used to be located there. It is one of the six subbarrios which form part of the Old San Juan Historic District.
Half of La Perla is located within the borders of the Mercado subbarrio, the other half is located in the neighboring subbarrio, San Cristóbal.
History
Along with subbarrios Catedral, San Cristóbal and San Francisco, Mercado is one of the four districts that represent the original boundaries of the Spanish walled settlement of San Juan during the 16th century. The population of the subbarrio subsequently grew around the Church of San José and the Convent of Saint Thomas Aquinas, established between 1523 and 1528. Originally known as Barrio de Santa Bárbara, Mercado was one of the five barrios that constituted the city of San Juan in 1845. It subsequently became a subbarrio of Barrio de San Juan (today San Juan Antiguo barrio) when Santurce was annexed to San Juan and the previous barrios were dissolved in 1863. As hinted by its name, the main marketplace of the city of San Juan used to be located in this subbarrio. This marketplace functioned until the early 20th century and, with its closure during this time, the nearby slaughterhouses and nearby freed slave houses subsequently developed into the modern community of La Perla.
Begin with the source’s own compact description: “Mercado, Old San Juan” is subbarrio in San Juan Antiguo, San Juan, Puerto Rico. The dossier treats that line as a proposition to test through Mercado, Juan and subbarrio, not as a finished interpretation.
Why this record matters
The phrase “subbarrio in San Juan Antiguo, San Juan, Puerto Rico” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 24, 2026. The linked authority identifier is Q6817988. Authority coordinates are 18.469, -66.117. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1523, 1528, 1845 and 1863.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Mercado, Old San Juan” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.