Fernmeldeturm Rosengarten, Telecommunications tower in Langenrehm, Rosengarten, Germany

The Fernmeldeturm Rosengarten is a reinforced concrete broadcast tower standing about 161 meters tall on a hill near Langenrehm in northern Germany. It transmits mobile phone, radio, and FM signals across a large area that includes residential neighborhoods and major transportation routes.

The facility was built in the mid-1990s to replace aging steel towers that could no longer meet growing communication network demands. It was part of expanding modern telecommunications infrastructure across northern Germany.

The tower's FM signal reaches from the Hamburg/Lübeck region into Schleswig-Holstein as far as the Kiel Canal and western Mecklenburg-Vorpommern; along the canal and around Rendsburg it can be received well on the high bridges. It also serves as a receiver for Lower Saxony radio programmes inside Hamburg's New Elbe Tunnel.

The tower sits on elevated ground and is visible from surrounding residential areas. The facility is not open to the public, but it can be photographed from outside and viewed from the surrounding landscape.

The tower has a special role in providing radio coverage for Hamburg's New Elbe Tunnel, transmitting signals even into the underground passages. This underground coverage is important for traffic moving through the tunnel, allowing drivers to maintain their radio connections.