francis joseph bigger (1863 – 9 december 1926) was an irish antiquarian, revivalist, solicitor, architect, author, editor, member of the royal irish academy, and fellow of the royal society of antiquaries of ireland. his collected library, now distributed across several public institutions, comprised more than 18,000 books, journals, letters, photographs, sketches, maps, and other materials. his house in belfast was a gathering place for irish nationalist politicians, artists, scholars, and others. he was a prolific sponsor and promoter of gaelic culture, authored many works of his own, founded (or co-founded) several institutions, and revived and edited the "ulster journal of archaeology".