The non-profit Slate Belt Museum and Historical Society was formed in 1977 to gather, curate and preserve artifacts, writings, art, memorabilia and other media that reflects and records the history of the Slate Belt region of the Lehigh Valley and Pocono Mountains of Eastern Pennsylvania. 

The country gothic building which houses the Slate Belt Museum was originally the Mount Bethel Presbyterian Church. This church had its beginnings in 1730 when some thirty families of Scotch-Irish birth settled in an area north of the Forks of the Delaware River, now Upper Mount Bethel and Washington Townships, particularly the villages of Martins Creek, Richmond and Mount Bethel. Alexander Hunter, an early leader, gave his name to this community, Hunter Settlement. Hunter Settlement was part of the land of the Lenni Lenape Indian territory and these pioneers were originally settlers in a hostile land.

In 1737, the infamous Walking Purchase secured all of this land for the settlers, although Indians remained in the area for years thereafter. This explains why the missionary, David Brainerd, who arrived at the Forks of the Delaware in 1744 tended to the spiritual needs of both the Lenape Indians as well as to Scotch-Irish Presbyterians in the area.

Although Presbyterian Church records prior to 1738 do not so indicate, it must be assumed that these people - stern and with rigid beliefs - had some form of church before this time. Settling in the wilderness was a hazardous business, and it probably took the Hunter Settlement until 1738 to organize sufficiently to call for a pastor to serve their young church. It is believed that they worshipped in a small building, most likely log, which stood on the old Presbyterian burying ground at Martins Creek.

In 1813 the members of the Mount Bethel Presbyterian Church from the northern part of the settlement around Centerville (present day Stone Church) and Williamsburg (Mount Bethel) organized their own church. In the beginning the congregation probably worshipped in a small log building which was shared with other denominations.

A deed dated June 21, 1823, states that Valentine and Catherine Stine sold to the Trustees of the English Presbyterians at Mount Bethel, a tract of land containing 2 acres and 20 perches for the sum of $190. Later, Squires Hagerman sold to the Trustees a tract for $75. It is believed these two parcels make up the property where the present building was built in 1836, with the surrounding land being used for a cemetery. The interior of the building had the customary high back pews with doors, all painted white and mounted in mahogany. A gallery extended around three sides with the choir occupying the end facing the pulpit.

In 1853 the Williamsburg Academy was built in the southwest corner of the cemetery. This parochial school was the first institution of higher learning in this area, and offered such classical education courses as Latin and Greek. Jonathan Moore, an elder in the church and the first schoolmaster, was paid $300 per year plus all the tuition income up to a total of $400. According to an advertisement in The Portland Enterprise of June 17, 1876, the tuition was $7.50 for a 10-week term, or 90 cents a week. Many graduates of this much needed course of education went on to fill honorable positions such as ministers, educators, public officials and community leaders. Unfortunately, the Williamsburg Academy burned in a fire 1894, and with it were destroyed some of the early records of the church which had been stored there.

By 1872 a committee was formed to see to the ‘repair of the old church at Williamsburg’. This work was done during the next year, when a recess was built at the back of the church to house the pulpit, the gallery was demolished and the pews reversed. In 1884, the church was further remodeled, with the floor being tiered and the pews being replaced with theater-style seats. This is essentially how the church remained into this century.

In 1963 the Mount Bethel Presbyterian Church merged with the Portland Presbyterian Church (which had originally been formed as a mission of the Mount Bethel Church). As part of the Community Presbyterian Church of Mount Bethel and Portland, the building remained in use as an active church until November 28, 1965, when the last worship service was held in the sanctuary. The building then remained vacant until it was given to the Portland Area Centennial in 1976. The following year the Centennial Committee turned it over to the Slate Belt Historical Society for the establishment of the museum to be used as a repository for writings, artifacts, art and memorabilia pertaining to the history and culture of the Slate Belt area.

A great deal of volunteer work has been accomplished to maintain the Slate Belt Museum, but much remains to be done in order to continue to restore and preserve the building. The building is listed on the Pennsylvania Inventory of Historic Places and is being reviewed for inclusion in the National Register of Historic Places, which would aid the museum in its restoration, by opening eligibility for additional financial resources.

A listing of the tombstones in the cemetery and the pastors who served the church is available at the museum.