The Roman Catholic Archdiocese of Split-Makarska (Croatian: Splitsko-makarska nadbiskupija; Latin: Archidioecesis Spalatensis-Macarscensis) is a metropolitan archdiocese of the Latin Rite of the Roman Catholic Church in Croatia and Montenegro. The diocese was established in the 3^rd century and was made an archdiocese and metropolitan see in the 10^th century. The modern diocese was erected in 1828, when the historical archdiocese of Salona was combined with the diocese of Makarska. It was elevated to an archdiocese and metropolitan see in 1969, restoring the earlier status of the archdiocese of Split, as it is also known. The diocese was also known as Spalato-Macarsca. 

Source: https://en.wikipedia.org/wiki/Roman_Catholic_Archdiocese_of_Split-Makarska