Thangtong Gyalpo's iron-chain bridges
Puentes de cadenas de hierro de Thangtong Gyalpo
- Date
- c. 1430 · confidence medium
- Place
- Paro, Bhutan
- Credited to
- Thangtong Gyalpo
- Field
- Tools
⚠️ Disputed: the sources disagree.
What it is
The Tibetan master Thangtong Gyalpo forged iron-link chains and strung them across Himalayan rivers as suspension bridges, several with decks and railings. Tradition credits him with dozens of bridges in Tibet and Bhutan.
Earlier iron-chain bridges exist in China (Lanjin, Yunnan, traditionally around the 1st century AD); the Himalaya remembers Thangtong Gyalpo (1385-1464, traditional dates) as the initiator. The '58 bridges' count is traditional and unverified.
What it led to
- a network of river crossings in the Himalayas
- iron metallurgy applied to infrastructure
- a precursor of 19th-century chain suspension bridges