Bishop Paull Spring, Northwestern Pennsylvania Evangelical Lutheran Church of America bishop, will preside at an anniversary worship service at 10:30 a.m. in the church, 3325 Morefield Road. The Rev. Jerrold Caughlin, interim pastor, will assist.

An anniversary dinner will follow at 12:30 p.m. in the Civic Center, Shenango and Pitt streets, Sharon.

A wooden scale model of the church was built by Holy Trinity Lutheran member Martin Banjak in observance of the anniversary. It is on display in the church.

Holy Trinity Lutheran Church was born Oct. 1, 1900, when 10 families attended the initial worship service in the former German Club in Sharon. The congregation, during a meeting that followed, named the church the Slovak Evangelical Lutheran Holy Trinity Church of South Sharon.

The first church was constructed on Greenfield Street in South Sharon, now Market Street in Farrell. Its building was dedicated June 9, 1901, with the Rev. Daniel Bella of Cleveland officiating.

The former Croatian Roman Catholic Church on Wallis Avenue in Sharon was for sale in 1918 and Holy Trinity purchased it for use. The congregation incorporated on March 12, 1923, and a parsonage was built along Wallis Avenue.

The congregation voted May 14, 1961, to leave the Slovak Zion Synod and join with the Pittsburgh Synod of the United Lutheran Church, which later became part of Lutheran Church of America. The church's name was changed to reflect that move.

Holy Trinity Lutheran Church formed a committee in late 1966 to build a new church, headed by the Rev. John Kanyuch, pastor and building committee chairman, now deceased.

A congregation groundbreaking ceremony was held March 6, 1969, at the present location on Morefield Road, and the new building was dedicated Aug. 9, 1970.

The church parsonage was converted in 1999 into an education center for Sunday school classes.

On Sept. 10, 2000, the educational wing was named in memory of the Rev. Carole Mohr, presiding pastor who unexpectedly died in December 1999.

The congregation of Grace Lutheran Church of Farrell voted to dissolve last April, and many of its members have since joined Holy Trinity Lutheran.