Pedzisa mutsara unotevera: Papa Leo vakamuita muprista mukuru weSant'Eusebio mumusangano we18 June 1899. Pashure pokupinda mu 1903 papal conclave, Richelmy's cardinalatial church yakatamiswa kuSanta Maria muVia musi wa 27 November 1911. Akanga ari mumwe wavaKardinal vakasarudzwa mu
conclave ya1914, uyewo iya ya1922, iyo yakasarudza Pope Benedict XV naPapa Pius XI nenzira inotevera. Muna 1915, Italy payakapinda muHondo Yenyika I, Richelmy akaronga kuti vapristi vaite basa rokuva vafundisi vemauto mumakomo eTrentino, kwavaichera atari muchando uye kuita Misa mumamiriro okunze aiva pasi pezero.