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Laguna de Bay

largest lake in the Philippines

Architectural plans, a scale model, maps and brass measuring instruments
Places and architectureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 20, 2026
Entity authorityQ47136
Source-derived summary

Laguna de Bay (Spanish for "Lagoon/Lake of Bay"; Filipino: Lawa ng Bay, [bɐˈʔi]), also known as Laguna Lake and alternatively spelled "Laguna de Bae", is the largest lake in the Philippines. Laguna de Bay remains one of the most important freshwater resources in the Philippines, supporting millions of residents through fisheries, agriculture, and domestic use. It is located southeast of Metro Manila, between the provinces of Laguna to the south and Rizal to the north. The freshwater lake has a surface area of 911–949 km2 (352–366 sq mi), with an average depth of about 2.8 meters (9 ft 2 in) and an elevation of about one meter above sea level. It is shaped like a crow's foot, with two peninsulas jutting out from the northern shore and filling the large volcanic Laguna Caldera. In the middle of the lake is the large island of Talim.

The lake is one of the primary sources of freshwater fish in the country. Its water drains to Manila Bay via the Pasig River. Environmental issues such as water quality problems created by population pressure and industrialization, invasive species, and overfishing are of concern to the lake, hurting its economic importance to the country. As the population expands in the Bay, it is expected to rely more heavily on the lake as a source of freshwater.

Editorial summary

Begin with the source’s own compact description: “Laguna de Bay” is largest lake in the Philippines. The dossier treats that line as a proposition to test through Laguna, largest and lake, not as a finished interpretation.

Editorial reviewA strong orientation record where physical form, institutional use and historical geography need to be read together. The current 221-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. For this dossier, Laguna, largest and lake is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “largest lake in the Philippines” 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.

Evidence profile

The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Sep 20, 2026. The linked authority identifier is Q47136. VIAF identifies the subject as 236996545. The Library of Congress control number is sh86000220. Authority coordinates are 14.300, 121.270. 1 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.

Critical limits

A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. 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.

How to read it

Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.

Best used for
  • Historic place names
  • Jurisdictional context
  • Routes into maps and plans
Verify next

Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.

Three-step research path

  1. Establish the record: confirm the title “Laguna de Bay”, its source revision and the description used here.
  2. Expand the search: follow Laguna de Bay primary sources, Laguna de Bay archive and Laguna research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Laguna de Bay”?
  2. Which authority defined the place, boundary or structure at the relevant date?
  3. What physical evidence or contemporary plan supports the description?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from Laguna de Bay” 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.