The St. Stanislaus Institute () is a Slovenian Roman Catholic educational institution in à  entvid, Ljubljana. Its origins date back to the end of the 19th century, when Ljubljana Bishop Anton Bonaventura Jegliàpresented the idea of creating the first fully Slovene-language upper secondary school. After many complications involving the city authorities' refusal to grant permission for construction in the center of the city, on 16 July 1901 Jegliàblessed the newly laid cornerstone of the institute. Construction lasted four years. The bishop blessed the building on 21 September 1905 and it was named after Saint Stanislaus Kostka.
This Slovene-language upper secondary school operated here until 28 April 1941, when the German authorities requisitioned the building. The instructors and students were forced to vacate the entire premises in only three hours. During the war it was used by the Gestapo. After the war, the premises were used as a collection center for captured Slovene Home Guard troops, most of whom were later killed. Some were executed in à  entvid and buried in a mass grave behind the à  entvid cemetery, some were transported to the Kucja Valley and killed there, and some were killed in the forest outside KoÃÂevje.
The building was then turned over to military use. It housed a barracks for the Yugoslav People's Army, which left the building in poor condition when it was vacated in 1991.
After Slovenia became independent in 1991 the property was returned to the Catholic Church. Classes started being held again at the Episcopal Classical Secondary School (), which is housed by the institute, on 1 September 1993.
In addition to the Episcopal Classical Secondary School, today the St. Stanislaus Institute also houses the JegliàDormitory for Boarding Students (), the Janez FranÃÂià ¡ek Gnidovec Student Residence (), a music school, the Slovenian Center (), the Good Shepherd Preschool (), and Alojzij à  uà ¡tar Elementary School ().
The directors of the institute after it was reopened have been Borut Koà ¡ir from 1993 to 2000, Anton Jamnik from 2000 to 2006, Roman Globokar from 2006 to 2018, and Tone ÃÂesen since 2018.