Detroit is served by various private schools, as well as parochial Roman Catholic schools operated by the Archdiocese of Detroit. As of 2013[update] there are four Catholic grade schools and <answer>three</answer> Catholic high schools in the City of Detroit, with all of them in the city's west side. The Archdiocese of Detroit lists a number of primary and secondary schools in the metro area as Catholic education has emigrated to the suburbs. Of the <answer>three</answer> Catholic high schools in the city, two are operated by the Society of Jesus and the third is co-sponsored by the Sisters, Servants of the Immaculate Heart of Mary and the Congregation of St. Basil.
How many Catholic high schools are in Detroit?
three