Winston-Salem officials are preparing to unveil a historic marker commemorating the country’s first and only African American Moravian Church. St. Philips Moravian Church was established in 1822 to serve enslaved people living in and around Salem, as the town was known at the time. According to a news release, the congregation had been meeting at local farms before moving into the log church. A marker commemorating the church will be unveiled at 3 p.m., Saturday, April 30.