This is the religious half of the chronicle genre — the vaṃsa literature, "lineage" history in the Buddhist sense: how the dhamma, the relics and the lineages of Buddhas descend through time. The parent chronicle genre flagged its own central fault-line — sacred tamnan versus secular history — and this is the larger of the two pieces: 569 of the roughly 1,060 chronicle witnesses carry the raw label Buddhist Chronicle, against 328 plain Tamnan and 159 Secular History.
The titles sort into a few recurring kinds:
Physically it is canonical — 92% palm-leaf (525 of 569) — and well-dated: 376 witnesses carry a date, spanning 1574–1990, one of the longer runs in the collection. But its geography is markedly more spread than the pure scholastic genres. Phrae leads (176) but Phayao (90), Chiang Mai (78) and Lampang (73) all hold substantial shares, and at temple level Wat Sung Men (128) is joined by Wat Si Khom Kham in Phayao (61) and a long tail of others. Because each relic and each that generated its own chronicle where it stood, the vaṃsa material is distributed across the landscape of sacred sites rather than concentrated in one library — the opposite of the canon's Wat Sung Men gravity.