 The main park of the city is Maribor City Park, with the City Aquarium and Terrarium, and a wide promenade leading to the Three Ponds (), containing over 100 local and foreign species of deciduous and coniferous trees.Maribor, previously in the Catholic Diocese of Graz-Seckau, became part of the Diocese of Lavant on 1 June 1859, and the seat of its Prince-Bishop.The name of the diocese (after a river in Carinthia) was later changed to the Diocese of Maribor on 5 March 1962.