From the History of Easton, Mass., by W. L. Chaffin, 1886, p. 411:
"In 1874 the Hon. Oliver Ames, the second of that name, began the erection of a new and beautiful church for this society [the Unitarian Society]. It is located on the gentle slope just north of where Mr. Ames himself lived, is Gothic in design, cruciform in shape, has a chapel connected with it which is used for the Sunday-school, and has rooms for social purposes below the auditorium. Its walls are of the native sienite from the quarry west of the schoolhouse, much of the stone having a warm pinkish hue. The rear walls are mainly built of the hard, dark trap-rock taken from a wide dike a few rods southwest of of the same quarry. The trimmings came from Randolph. The spire is made of bluish sienite from a quarry in Storey's Swamp, west of Long Pond, and is surmounted by a large stone cross. The beautifully finished wood-work of the interior of the church is of black walnut, and of the Sunday-school room it is of cherry. The organ and choir are at the right of the pulpit as one faces it."
The church is still active today. See the Unity Church web site.