[1] Blenduk Church, at 32 Letjen Suprapto Street in the old town of Semarang, Central Java, is located in a small courtyard between former office buildings.

[2] The octagonal church, built on a stone foundation and with single-layer brick walls, has its ground floor at street level.

[5] Two towers, square at the base and slowly rounding until topped with a small dome, are located on either side of the main entrance, while a cornice consisting of horizontal lines runs around the building; Roman-style porticoes covered in saddle-shaped roofs are located on its eastern, southern and western faces.

[5] In the northern part of the interior is a spiral staircase, etched with name of its manufacturer, Pletterij den haag (Rolling Mill, The Hague), which leads to the second floor.

[1] In February 2009, Blenduk received an award for Best Maintained Old Place of Worship from the Central Java branch of the Architects' Society of Indonesia.