Trinity Church, Lutheran church in Friedrichsberg, Schleswig, Germany

Trinity Church is a brick hall church with a polygonal east end, built in 1650–1651 to a design by Adam Olearius. Its south side has a Baroque portal with the founder's coat of arms, the year 1650 and an hourglass. The neo-Gothic west tower, added in 1872, has a copper-clad spire and a clock.

The church was built between 1650 and 1651, funded by Elisabeth Beling's endowment and donations from Duke Friedrich III and his son. The neo-Gothic tower was added later in the 1800s, reflecting changing architectural tastes of that era.

The sandstone font, carried by two putti, is a signed work of Cornelius van Mander, a Delft-born sculptor at the Gottorf court and grandson of Karel van Mander I. An inscription on the bowl records that he and his wife Cornelie donated it in 1651.

The church belongs to the Schleswig parish within the Lutheran church district of Schleswig-Flensburg in Northern Germany. Visitors should check opening times and watch for services or events that may affect access to the building.

The organ's 1687/88 case by Ahasver Schütze survived later rebuilds: Marcussen & Søn replaced the pipework in 1903, and Karl Schuke installed the present instrument in 1980, with mechanical action and 26 registers on two manuals and pedal. The case is thus older than the organ it frames.