IHLIA is the heritage organisation with a socially relevant and indispensable collection.

IHLIA is an independent organisation located in OBA Oosterdok in Amsterdam. IHLIA is continuously involved in collecting information about the LGBTIQ+ community and making it accessible. LGBTIQ+ stands for lesbian, gay, bi+, transgender, intersexe and queer persons. Anyone can turn to IHLIA for information about homosexuals, lesbians, bisexuals, transgender, intersexe and queer persons, and about their history, everyday life and culture.

The archive contains collections that are complete to a large extent and it contains several unique key collections and archives of other organizations. The archive in general is considered top quality and has national and international significance.