Pictorial postcard by Pos Indonesia depicting Blenduk Church. Blenduk Church (Gereja Blenduk) or official name is The Protestant Church in Western Indonesia Immanuel Semarang (Gereja Protestan Indonesia Barat Immanuel Semarang) is a protestant
church in Semarang, Central Java, Indonesia. It is located in Semarang old town complex, in a small courtyard between former office buildings.
This building was built in 1753, so it is the oldest church in the province. The octagonal church, built on a stone foundation and with single-layer brick walls, has its ground floor at street level. It is topped by a large, copper-skinned dome, from which it gets its common name (the Javanese word 'blenduk' means dome). The dome is supported by 32 steel beams, 8 large and 24 small.