Sullivan supported Carte, and Gilbert felt betrayed. Sullivan felt that Gilbert was questioning his good faith, and in any event, Sullivan had other reasons to stay in Carte's good graces: Carte was building a new theatre, the Royal English Opera House, to produce Sullivan's only grand opera, "Ivanhoe". On 5 May 1890, Gilbert had written to Sullivan: "The time for putting an end to our collaboration has at last arrived." Gilbert brought suit, and after "The Gondoliers" closed in 1891, he withdrew the performance rights to his libretti and vowed to write no more operas for the Savoy.