Gutzlaff Signal Tower, Signal tower in Huangpu District, China

Gutzlaff Signal Tower is a 36.8 m reinforced-concrete tower at the southern end of the Bund, designed by Spanish industrialist Modesto Marti de Sola and built in 1907 in Beaux-Arts style. Its white shaft carries three bands of red brick and is topped by a 12 m signal mast, giving a focal height of 49.8 m.

Built in 1907 by the Shanghai Reinforced Concrete Company, it broadcast weather warnings to ships until decommissioned in 1956. The tower reflects Shanghai's past as a major port serving international vessels.

The name refers to Karl Gützlaff, a German missionary who worked as an interpreter in Shanghai. Visitors see a building that reminds them of the era when foreign powers shaped the city.

The ground floor holds a museum displaying the Bund's history through photos and objects. The first floor has a cafe where you can sit and observe the river views and surrounding architecture.

The tower's official name honours Karl Gützlaff, a Prussian missionary (1803–1851), though why it was named after him is no longer documented. The 450-tonne structure was moved 24.5 metres in 1993, a few centimetres a day, without damage.