7076 20241010111950.0 SCART-2024-0163 Uronen, Laura E Finding Black Holes: an Unconventional Multi-messenger 2024 A rather clear problem has remained in black hole physics: localizing black holes. One of the recent theoretical ways proposed to identify black hole mergers’ hosts is through multi-messenger gravitational lensing: matching the properties of a lensed galactic host with those of a lensed gravitational wave. This paper reviews the most recent literature and introduces some of the ongoing work on the localization of binary black holes and their host galaxies through lensing of gravitational waves and their electromagnetically-bright hosts. NO Li, Tian Janquart, Justin Phurailatpam, Hemantakumar Poon, Jason Koopmans, Léon Hannuksela, Otto Akseli Philosophical Transactions A 2024 justin.janquart@ksb-orb.be submitted to NONREF