This study offers an overview on the legal institution of Latin ordinariates for the faithful of the Eastern Ecclesiae sui iuris. These ordinariates constitute a personal defined particular church unit of the Catholic Church. In a first section, the article evaluates the possibilities and existing manifestations of non-territorial structural elements within the hierarchical constitution of the Church in accordance with CIC/83 and CCEO, before in chapter two the focus of attention is laid on investigating especially the Latin ordinariates for the faithful of the Eastern Ecclesiae sui iuris. Then, the remaining five sections analyze the five currently existing Latin ordinariates for the faithful of the Easterm Ecclesiae sui iuris in Poland, Argentina, Brazil, France and Austria, focusing on their historical development and the quality of the Latin ordinary's potestas iurisdictionis.