Pius XI and portantina

Pius XI surrounded by members of his court emerging from a covered litter called in Italian portantina. The Pope is dressed in summer choir dress, i.e. a rochet and silk mozzetta, and has a saturno on his head. The litter door is held on one side by an officer of the Noble Guard, and on the other by the apostolic protonotary ad instar participantium and the Prefect of Papal Ceremonies, Mons. Carlo Respighi.