An entry point to the written heritage of the Middle Ages and the Renaissance in Western Europe, from the 8th to the 18th century.
A search engine of interoperable digitized manuscripts and rare books
Collaborative platform to manage and publish Biblissima authority data
Help for reading and learning classical languages, XML editing tools and environments
Expertise service around IIIF standards
Biblissima+ Identifier: https://data.biblissima.fr/entity/Q283456
Tractatus proportionum, Portal Biblissima. Permalink: https://biblissima.demo.logilab.fr/ark:/43093/oedata251ba08edf1e9579e099d64f6b34272c3bf7427f (seen 17/10/2026)
RDF exports to come…
You can view and manipulate this document directly on this site, compare it to others using the Mirador viewer, or drag and drop this icon into the IIIF viewer of your choice. Read more about IIIF This Manifest is enriched and includes: - annotations - a full-text search - an index