MAIORANO, ElisabettaElisabettaMAIORANOAMATI, LORENZOLORENZOAMATIROSSI, AndreaAndreaROSSISTRATTA, MARIA GIULIANAMARIA GIULIANASTRATTAPALAZZI, ELIANAELIANAPALAZZINICASTRO, LUCIANOLUCIANONICASTRO2020-11-062020-11-0620180037-8720http://hdl.handle.net/20.500.12386/28199The Transient High Energy Sky and Early Universe Surveyor (THESEUS) is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. A fundamental contribution to achieve this goal will be provided by the powerful synergy between THESEUS and the extremely large ground-based telescopes which will operate in the next decade, like E-ELT. We discuss great improvements coming from this joint effort and describe some possible observing scenarios.ELETTRONICOenArticlehttp://sait.oat.ts.astro.it/MSAIt890218/index.html2018MmSAI..89..181MFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos