The official name of Helsinki Rock Church is Tempolioquio Church. It is the most distinctive and popular tourist attraction in Helsinki. The church was designed by two brothers, Dimo and Tomo. It was started in February 1968 and completed in September 1969. Rock churches are built in natural rocks by digging down the rocky parts of the highlands on residential streets. Some people think that this is an act of not harming the natural landscape. In fact, it is a must-have creation after the construction budget of the church has been reduced to 25 [%]. It is a masterpiece of the architect's brothers. Another feature of Rock Church is its dome. The dome is supported by 180 spokes. In the center, it is a copper dome with a diameter of 24 meters and coiled with copper bars. The diameter of the copper bars is 2 cm and the total length is 22 km. The outer ring of the copper dome is a 5-metre wide glass window, which can illuminate the whole hall with natural light. The church was criticized for its design and construction, but when the magnificent hall was opened to the public, all the criticisms were silent. The third feature of Rock Cathedral is the organ here. The pipe organ here claims to be the largest in Nordic, with four keyboards, 43 vocal ranges and 3001 pipes in size and size. The church is designed with full consideration of the sound effect of the hall, so it is also a well-known organ performance venue, where many concerts will be held.