The Institute of Christ the King Sovereign Priest, Latin: Institutum Christi Regis Summi Sacerdotis, abbreviated as ICKSP and ICRSS,[3] is a society of apostolic life of pontifical right[4] in communion with the Holy See of the Catholic Church.

Its international seminary of Saint Philip Neri is also located there, and the institute's ordinations and other major masses are held at the church of San Gaetano in Florence.

In the United States, the institute is headquartered in Chicago, with presences in Illinois, Wisconsin, Missouri, New Jersey, Connecticut, California, Arizona, Michigan, Pennsylvania, Louisiana, and Ohio,[9] with a forthcoming apostolate in Worcester, Massachusetts announced in September 2023.

[11] Its oldest United States apostolate is the Saint Mary Oratory in Rockford, Illinois, and its newest is the St. Elizabeth of Hungary Shrine in Cleveland, Ohio.

Also in 2005 St. Francis de Sales Church in Saint Louis, Missouri was established as an oratory under care of the institute, to serve the city and region.

[13] The institute is also closely involved in the annual Catholic Voice conference held in Limerick, which features amongst its regular speakers Cardinal Raymond Leo Burke and John Hunwicke.

[15] In addition to its oratories in the United States and missions in Africa, the institute also has apostolates in France, Spain, Belgium, Italy, Germany, Austria, and Switzerland.

During its yearly ordinations week in Italy, the institute has had visits by Cardinals Raymond Leo Burke, Antonio Cañizares Llovera, Darío Castrillón Hoyos, as well as Archbishop Camille Perl.

[citation needed] The Adorers of the Royal Heart of Jesus Christ Sovereign Priest are a women's community founded in 2001 that is associated with the institute.

They are at Gricigliano, Livorno and Naples in Italy, Engelport in Germany, Les Cotes in Switzerland, Preston in England, Ardee in Ireland, Wausau in the USA, and Loisy in France.

Priests, superiors, and the prior general In September 2023, the French newspaper Le Parisien released four articles about 14 confessions they received from ex-members, in which they claimed that the Institute partakes in various abuses.

Wach, claiming that the journalist failed to research the topic adequately[24], and that the articles are biased, saying, "... many questions which you have asked me... seem more like a copy-pasted pamphlet than a serious inquiry.