Memorial Bridge (Bangkok)
bridge crossing Chao Phraya River, Thailand
The Memorial Bridge (Thai: สะพานปฐมบรมราชานุสรณ์) is a bascule bridge over the Chao Phraya River in Bangkok, Thailand, connecting the districts of Phra Nakhon and Thonburi.
History
The bridge opened on 6 April 1932, by King Prajadhipok (Rama VII) in commemoration of the 150th anniversary of the Chakri dynasty and the foundation of Bangkok, shortly before the Siamese coup d'état of 24 June 1932. In English the bridge is commonly known as Memorial Bridge, however in Thai, it is most commonly known as Phra Phutthayotfa Bridge (สะพานพระพุทธยอดฟ้า), after King Phutthayotfa Chulalok (Rama I), the first king of the Chakri dynasty. The name is more commonly shortened as Saphan Phut (สะพานพุทธ) or Phut Bridge or Buddha Bridge (meaning: Bridge of Buddha).
Construction of the bridge was started on 3 December 1929 by Dorman Long, Middlesbrough, England, under the supervision of Italian technicians from SNOS (Società Nazionale Officine Savignano). The bridge used to have a double-leaf bascule-type lifting mechanism, which is now unused.
On 5 June 1944, as part of the bombing of Bangkok in World War II, a force of B-29 Superfortresses, in a test of their capabilities before being deployed against the Japanese home islands, targeted the bridge. Their bombs fell over two kilometers away, damaging no civilian structures, but downed some tram lines and destroyed a Japanese military hospital and the Japanese secret police headquarters. It was not until 1947 that Thai authorities learned of the intended target. Eventually, it was taken out by the Allies and rebuilt in 1949.
Begin with the source’s own compact description: “Memorial Bridge (Bangkok)” is bridge crossing Chao Phraya River, Thailand. The dossier treats that line as a proposition to test through Memorial, Bridge and Bangkok, not as a finished interpretation.
Why this record matters
The phrase “bridge crossing Chao Phraya River, Thailand” 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.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Jun 5, 2026. The linked authority identifier is Q1519969. Authority coordinates are 13.739, 100.498. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1932, 1929, 1944 and 1947.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Memorial Bridge (Bangkok)”, its source revision and the description used here.
- Expand the search: follow Memorial Bridge (Bangkok) primary sources, Memorial Bridge (Bangkok) archive and Memorial research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Memorial Bridge (Bangkok)”?
- Which earlier names or jurisdictions may reveal additional records?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Memorial Bridge (Bangkok)” 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.