CANTON — Tour five historic religious structures in Canton this weekend for free. Houses of worship in Canton are welcoming visitors for tours and activities are planned.

The churches of Canton will jointly open their doors to the public on May 21 and 22 from 1 to 3 p.m.

Saint Mary’s, 68 Court St., welcomes visitors to tour their sanctuary with docents available to answer questions.

The red-brick Neo-Gothic structure, the second building on the site, is celebrating the 140th anniversary of its building this year. Following a fire of the original wooden structure, the Pastor at the time, Father O’Driscoll oversaw the construction new masonry church in 1874. As a visitor be sure to see the 1861 Levi Stuart Organ, Horwood stained glass windows, and the Divine Mercy Chapel.

There will be an organ demonstration, refreshments, food and self-guided tour.

The First Presbyterian Church on the Park, 17 Park St., will offer tours, refreshments, food and activities for children and families.

The sanctuary will be open to the public for self-guided tours with members of the congregation on hand to answer questions.

Plans for the church were drawn by L.B. Valk of New York with the contract let to local builders O. Moore and Thomas Fields who oversaw its construction in 1876. The historic Gothic Revival church has a number of original stained glass windows and still sports an impressive, complex slate roof with several spires, including the tallest steeple in Canton. The Church is sited on Village Park, a public commons created when land was granted to the congregation in 1827.

The Unitarian Universalist Church of Canton, 3 1/2 East Main St., will offer self-guided tours.

The church was designed by Samuel D. P. Williams and J. R. Porter Johnson and built of local gray marble, also known as Canton Gray Stone, in 1897. The Romanesque Revival architecture is characterized by the church’s round arches and the mass of the masonry. There are many beautiful stained glass windows in the sanctuary as well as an Andrews tracker organ. The present church replaced the congregation’s earlier, 1829 church building on the same site, originally known as Union Church because it was shared with a Baptist congregation. The congregation was instrumental in founding St. Lawrence University, founded as a Universalist Seminary in 1856.

Tours will also be offered at Canton United Methodist Church, 41 Court St. Tours are from noon to 3 p.m. Saturday and noon until 2 p.m. on Sunday.

Grace Episcopal Church, 9 East main St., will offer guided tours from 1 to 3 p.m.

Built in 1903 to replace an 1830-frame church on this site the Gothic Revival stone church designed by Architect Richard Hubbard of Utica, NY was built of locally quarried stone. The building embodies the characteristics of the English Parish Church form.

Stained glass windows (made by Mayer & Company of Munich, Bavaria) throughout with Ascension and Resurrection stained glass windows are set in both gable ends of the sanctuary.

Local wood, such as cherry, oak, and black walnut were taken from the original church of 1830 and placed in the present church. The impressive rood beam featuring a carved Calvary group, was given in memory of Leslie Russell, County Judge.