Rigaut, FrancoisBrodrick, DavidAgapito, GuidoViotto, ValentinaPlantet, CedricSalasnich, BernardoMcDermid, RichardCresci, GiovanniEllis, SimonAliverti, MatteoAntoniucci, SimoneBalestra, AndreaBaruffolo, AndreaBergomi, MariaBonaglia, MarcoBono, GiuseppeBusoni, LorenzoCarolo, ElenaChinellato, SimonettaDe Silva, GayandhiEsposito, SimoneFantinel, DanielaFarinato, JacopoFusco, ThierryHaynes, DionneHorton, AnthonyGausachs, GastonGilbert, JamesGratadour, DamienGreggio, DavideGullieuszik, MarcoHaguenauer, PierreKorkiakoski, VisaMagrin, DemetrioMagrini, LauraMarafatto, LucaMcGregor, HelenMendel, TrevorMonty, StephanieNeichel, BenoitPedichini, FernandoPinna, EnricoPortaluri, ElisaRadhakrishnan, KalyanRagazzoni, RobertoRobertson, DavidSchwab, ChristianSharp, RobStangalini, MarcoStroebele, StefanThorn, ElliottVaccarella, AnninoVassallo, DanieleVenkatesan, SudharshanWaller, LewWarner, StacyZamkotsian, FredericZhang, Hao2026-01-012026-01-01ORCID:/0000-0003-3490-7121/work/162686648https://hdl.handle.net/1885/733799151MAVIS, the Multi-conjugate Adaptive-optics Visible Imager-Spectrograph is an instrument being built for the Very Large Telescope Adaptive Optics Facility. The exquisite angular resolution provided by the AO module -in combination with the AOF- will be exploited by a 4kx4k imager and a monolithic IFU covering the optical region. MAVIS is currently in phase A (conceptual design), and the consortium just passed the phase A mid-term review. In this paper, we introduce the project, detail trade-off studies and provide a snapshot of the numerical simulations and current design choices. MAVIS is shaping up to be a truely amazing facility, providing 3× the HST angular resolution with better sensitivity on point sources. MAVIS will be a workhorse facility instrument for the VLT into the 2030s, complementing very effectively facilities like the ELTs, and facing little competition in the current astronomical instrumentation landscape.enPublisher Copyright: © 2019 AO4ELT 2019 - Proceedings 6th Adaptive Optics for Extremely Large Telescopes. All rights reserved.Adaptive opticsAstronomical instrumentationHigh angular resolutionIntegral field spectrographsMulti-conjugate adaptive optics201985084944209