Around 1872, Zuloaga's workshop was commissioned to make the monumental sarcophagus for General Juan Prim. Work began in Eibar, but due to the civil war of 1873 he moved his workshop across to the border to Saint-Jean-de-Luz in France where the work was completed. Prim's tomb now resides in the cemetery at Reus. Around 1900, Zuloaga was commissioned by the Society of Jesus to construct an altar for the Sanctuary of St. Ignatius at Loyola. This was the last major project that he completed, referred to sometimes as his "posthumous" work, although in fact the altar was completed and installed at Loyola in 1909 while he was still alive. It was described by Pedro Celaya in 1981 as "one of the greatest works... that has been produced in Eibar."