Joly de Lotbinière Estate, National historic site and garden in Sainte-Croix, Canada.

The Joly de Lotbinière Estate is a picturesque-style park-garden on the St. Lawrence at Pointe-Platon, between Sainte-Croix and Lotbinière. It holds twelve old buildings and eleven themed gardens with more than 2,300 plant varieties. Pierre-Gustave Joly built the two-storey summer house called Maple House in 1851; the servants' house followed in 1852, then the carriage shed, henhouse and laboratory.

Pierre-Gustave Joly, a French businessman born in Switzerland, bought the Pointe-Platon land in 1846 after years of negotiation and built a wharf and keeper's residence that same year. In 1851 he built a two-storey summer house called Maple House; a servants' house followed in 1852, then a carriage shed, henhouse and laboratory. Quebec expropriated the estate from Edmond Joly de Lotbinière in 1967, opened it to the public in 1984 and transferred it to the Domaine Joly-De Lotbinière foundation in 1998.

The estate's name comes from the Joly de Lotbinière family, who created it in the mid-19th century. Pierre-Gustave Joly, a French businessman born in Switzerland, married Julie-Christine Chartier de Lotbinière in 1828 and later bought the Pointe-Platon land in 1846. The site now holds eleven themed gardens with over 2,300 plant varieties, including sections for roses, irises, peonies and medicinal plants.

Visiting is best on warmer days when the gardens are fully accessible and walking through the grounds is comfortable. Parking, restrooms, and orientation panels are available to help you navigate the property.

Pierre-Gustave Joly fitted out a laboratory at the estate where he studied the movement of planets, tides, minerals, gemstones and metals, and ran chemistry experiments. The building was added after the 1851 Maple House and the 1852 servants' house, alongside the carriage shed and henhouse.