IHLIA LGBTI Heritage, formerly known as the International Gay/Lesbian Information Center and Archive (Dutch: Internationaal Homo/Lesbisch Informatiecentrum en Archief; IHLIA), is an international archive and documentation center on homosexuality, bisexuality and transgender.

[1][2] It collects, preserves and presents to the public all kinds of information in the field of LGBTI.

IHLIA curates the largest LGBTI collection of Europe with over 100,000 titles on 1515 meters of shelf length – books, journals and magazines, films, documentaries, posters, photographs and objects such as T-shirts, buttons and condom packaging.

IHLIA was founded in 1999 by merging the Homodok (documentation on homosexuality of the University of Amsterdam), the Lesbian Archives of Leeuwarden hosted at the Anna Blamanhuis, and Lesbisch Archief Amsterdam (LAA).

They provide access to archival materials on request, for instance to students of Gender Studies at the University of Amsterdam.