It's a, now Ukrainian, Soviet transporter built for their space shuttle program. It has carried the only Buran built on its back. iirc there's a couple more An.225 airframes from the 80s that might be completed now that the profits are going ok. Tho that was before the current hike in oil-prices.
Forumers met so far:
Huopa, Nightsky, Jo, wolkenkrabber, ThisSideofSteinway, jacksom, New Jack City, LeCom, Ellatur, Jan, Dennis, Ace, Bardamu, AtlanticaC5, Ringil, Dysfunctional, stacey, karakhal, ch1le, Hviid, staff, kjetilab, Þróndeimr, queetz, FREKI, sander, Blue Viking, nomels, Mantas, ristov, Rafal_T, khaan, Chilenofuturista, Jonte Myra, safta20, AW, Pas, Jarmo K, IceCheese, Sideshow_Bob, sk, Ingenioren, Ayreonaut, Silver Creations, Hasse78, Svartmetall