It designated prelates belonging to the Papal Chapel, who stood near the throne of the Pope at solemn functions.
Assistants at the Pontifical Throne, unless specifically exempted, immediately enter the Papal nobility as Counts of Rome.
[1] Bishops assistants (assistentes solio pontificio) are named by a Brief of the Secretariate of State, and in virtue of their office are members of the Pontifical Chapel (Cappella Pontificia).
[3] On 22 May 1862, during the canonization ceremony of the twenty-six Catholic martyrs of Japan, Pope Pius IX elevated all the bishops present to the rank of Assistant at the Pontifical Throne.
On 17 June 1867, during the 1800th anniversary of the martyrdom of Saints Peter and Paul, Pope Pius IX elevated all the bishops present to the rank of Assistant at the Pontifical Throne.