Historical research · European citizenship
Your family's history, documented to the standard of proof.
Mnésis is a historical, genealogical and documentary research firm founded by a University of Coimbra–trained historian, based in Brazil and working across Brazilian, Portuguese and Spanish archives for two decades. We conduct full European citizenship processes — Portuguese, Italian, Spanish and German — from the first archival hypothesis to the final application, supported by a proprietary collection of over 800,000 immigrant records.
What we do
From the archive shelf to the passport.
Most providers either search documents or file applications. Mnésis does the entire journey — because in complex cases, the research and the legal strategy cannot be separated.
Full citizenship processes
End-to-end Portuguese, Italian, Spanish and German nationality processes: viability analysis, archival research, civil records rectification, apostilles and translations, application filing and follow-up until recognition. One team, accountable for the whole chain.
Documentary & genealogical research
Location of birth, baptism, marriage and immigration records in Brazil, Portugal and Spain — including cases where the family only holds oral history. Our archive covers all Portuguese consular registrations in Brazil and maps 95% of Portuguese immigrants to Pará state (1870–1960).
B2B documentary support
Record location, chain-of-descent verification and certified documentary dossiers for firms conducting nationality processes at scale. Your firm keeps the client relationship; we supply the evidence.
Technical opinions — Sephardic route
Expert genealogical opinions on Sephardic ancestry for institutions and legal teams, grounded in primary-source research. Available as a specialized B2B service for qualified organizations.
The archive
Two decades of fieldwork, not a database subscription.
Our collection was built record by record in parish archives, consulates, ports and notary offices across Brazil, Portugal and Spain. It includes 87,348 immigration documents from the São Paulo consulate (1890–1970) and is not available on any major genealogy platform — which is why cases considered "undocumentable" elsewhere are often solvable here.