It maintains close links with the Church of Scotland in Scotland itself, as well as with the Reformed Church of France. Italy The Waldensian Evangelical Church (Chiesa Evangelica Valdese, CEV) is an Italian Protestant denomination. The church was founded in the 12th century, and centuries later, after the Protestant Reformation, it adhered to Calvinist theology and became the Italian branch of the Presbyterian churches. As such, the church is a member of the World Communion of Reformed Churches. North America Even before Presbyterianism spread with immigrants abroad from Scotland, there were divisions in the larger Presbyterian family. Some later rejoined only to separate again. In what some interpret as rueful self-reproach, some Presbyterians refer to the divided Presbyterian churches as the "Split Ps". United States Presbyterianism first officially arrived in Colonial America in 1644 with the establishment of Christ's First Presbyterian Church in Hempstead, New York. The Church was organized by the Rev. Richard Denton. In 1703 the first Presbytery in Philadelphia was established. In time, the presbytery would be joined by two more to form a synod (1717) and would eventually evolve into the Presbyterian Church in the United States of America in 1789. The nation's largest Presbyterian denomination, the Presbyterian Church (U.S.A.) – PC (USA) – can trace its heritage back to the original PCUSA, as can the Presbyterian Church in America (PCA), the Orthodox Presbyterian Church (OPC), the Bible Presbyterian Church (BPC), the Cumberland Presbyterian Church (CPC), the Cumberland Presbyterian Church in America, the Evangelical Presbyterian Church (EPC), and the Evangelical Covenant Order of Presbyterians (ECO). Other Presbyterian bodies in the United States include the Reformed Presbyterian Church of North America (RPCNA), the Associate Reformed Presbyterian Church (ARP), the Reformed Presbyterian Church in the United States (RPCUS), the Reformed Presbyterian Church General Assembly, the Reformed Presbyterian Church – Hanover Presbytery, the Covenant Presbyterian Church, the Presbyterian Reformed Church, the Westminster Presbyterian Church in the United States, the Korean American Presbyterian Church, and the Free Presbyterian Church of North America. The territory within about a radius of Charlotte, North Carolina, is historically the greatest concentration of Presbyterianism in the Southern United States, while an almost identical geographic area around Pittsburgh, Pennsylvania, contains probably the largest number of Presbyterians in the entire nation. The PC (USA), beginning with its predecessor bodies, has, in common with other so-called "mainline" Protestant denominations, experienced a significant decline in members in recent years.