Massaro, E.E.MassaroMASELLI, AlessandroAlessandroMASELLI0000-0003-3760-1910Leto, C.C.LetoMarchegiani, P.P.MarchegianiPERRI, MatteoMatteoPERRI0000-0003-3613-4409Giommi, P.P.GiommiPIRANOMONTE, SilviaSilviaPIRANOMONTE0000-0002-8875-54532020-07-072020-07-0720150004-640Xhttp://hdl.handle.net/20.500.12386/26376The 5th edition of the Roma-BZCAT Multifrequency Catalogue of Blazars is available in a printed version and online at the ASDC website (http://www.asdc.asi.it/bzcat); it is also in the NED database. It presents several relevant changes with respect to the past editions which are briefly described in this paper.STAMPAenArticle10.1007/s10509-015-2254-22-s2.0-84928323406000354392400019https://link.springer.com/article/10.1007/s10509-015-2254-22015Ap&SS.357...75MFIS/05 - ASTRONOMIA E ASTROFISICA