Chaksam, 'the iron bridge', is named for the chain bridge that Thangtong Gyalpo builds in the 1430s; in 1200 it is only a ferry on the road from Lhasa and Qushui to Gongkar and the Lhoka, with no bridge.
The position (29.32 N, 90.78 E) is approximate, from our notes, and may be 8 km out. Who takes the ferry dues in 1200 is not known.
Who holds it
- Title
- Ferry-keeper or lord of the crossing
- Since
- not pinned
- Confidence
- low
No source we could open names the holder for the winter of 1199-1200.
Overlord
none: no one rules Tibet in 1200; the house answers to its own patrons and to the custom of the valleys
How things stand that morning
A ferry crossing; no bridge until the 1430s.
Wealth
No source we could open gives figures; the usual base is estates and serfs, herds, pass tolls, trade in salt, wool, tea and barley, and the gifts of patrons.
Military
No standing army; the house or lord calls on retainers, tenants and kin. No troop numbers are given by any source we could open.
Council
none known; the place is governed by its lord or house, and no source we could open names a headman or judge
Communities
Tibetan; no other community is attested here
Fairs and markets
none known; pilgrims and caravans meet at the feasts of the temples, but no fair is dated
Walls and castle
none known; the dzong (fort) as an institution of the district lord belongs to the fourteenth century
Trade and crafts
not described by any source we could open
What the year holds
What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.
- c. 1430sThangtong Gyalpo builds iron-chain bridges, including Chaksam.Depends on: The fifteenth century; outside the game's horizon. Stopped by: None.
Where the sources disagree
- The 1430s date is from memory and not checked; no page we opened mentions the bridge.
Evidence: Recollection of the later bridge and of the road. Treasury of Lives, the Blue Annals, the Red Annals, Petech, Sorensen and Hazod and Davidson could not be opened in this session (treasuryoflives.org and rigpawiki.org refused the fetch; the archive.org full texts were refused or cut off), so facts marked 'recalled' are from memory of those works and unchecked.
Primary sources for Tibet (centre)
Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.
- History of Buddhism in India and Tibet, Buton Rinchen Drub (Bu ston Rin chen grub) (1322). Optional background. Read online
- The Blue Annals, Go Lotsawa Zhonnu Pal ('Gos lo tsa ba gZhon nu dpal) (1476 to 1478). The fullest Tibetan account of who mattered around 1200, written three centuries later from earlier biographies and lineage records, many now lost. Read online
- The collected works of Lama Zhang, and the early Kagyu lives, Lama Zhang (Zhang Yudrakpa Tsondru Drakpa) and his disciples; the biographers of Drigung, Taklung and Phagmodru (the 1160s to the early 13th century). The nearest contemporary witnesses to the lords of central Tibet in 1200. Read online
- The Sakya genealogy, and the works of the Sakya hierarch of 1200, Jetsun Drakpa Gyaltsen (Grags pa rgyal mtshan) and Sakya Pandita; the genealogy by Ngawang Kunga Sonam (the hierarchs' writings about 1170 to 1250; the genealogy 1629). Sakya in 1200 was ruled by Jetsun Drakpa Gyaltsen, the third of the five founders, with his nephew Kunga Gyaltsen (later Sakya Pandita, born 1182) under his teaching. Read online
- History of the Song, the chapters on Xia and on foreign states, Toqto'a (脫脫) and the Yuan history office (1343 to 1345). The Song court's accounts of its neighbours, each arranged as an annal of embassies and wars. Read online
- Indo-Tibetica (the temples and inscriptions of western Tibet), with the Royal Genealogy of Ngari, Giuseppe Tucci (editor and translator); the genealogy by Ngawang Drakpa (Ngag dbang grags pa) (the inscriptions and temple records of the 11th to 15th centuries; Indo-Tibetica published 1932 to 1941; the genealogy about 1497). Guge, Purang and Ladakh in 1200 are among the least documented kingdoms in the atlas. Read online
Sources and studies
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.