Church of the Redeemer, Sacrow
Campanile
### Campanile

[thumb\|Campanile and part of the Western Front](/wiki/Image:Heilandskirche_Sacrow_Campanile2.jpg "Heilandskirche Sacrow Campanile2.jpg")

On rectangular forecourt with its [exedra](/wiki/Exedra "Exedra") on the narrow side, stands the over 20 meter high [campanile](/wiki/Campanile "Campanile") (from [Latin](/wiki/Latin_language "Latin language") *campana* \= bell). The tower has the same mixture of bricks and tiles as the rest of the church. The arched windows rise to the top and end in the last story with an open [belvedere](/wiki/Belvedere_%28structure%29 "Belvedere (structure)"). The tower culminates in a shallow pavilion roof with a ball and cross atop it.

The Church of the Redeemer campanile contains a c. 600\-year\-old bronze bell. Its traditional casting date is 1406, although this is impossible to prove. It was first mentioned in 1661\. The bell presumably comes from the old stone church. A second bell was confiscated for [armament](/wiki/Armament "Armament") production in 1917 and its replacement suffered the same fate in 1944\.

In the summer of 1897, the bell tower was used by the [physicists](/wiki/Physicist "Physicist") [Adolf Slaby](/wiki/Adolf_Slaby "Adolf Slaby") and [Georg Graf von Arco](/wiki/Georg_Graf_von_Arco "Georg Graf von Arco") to try to perfect [Marconi](/wiki/Guglielmo_Marconi "Guglielmo Marconi")'s radio technology. It was the site of the first German antenna for [wireless telegraphs](/wiki/Wireless_telegraph "Wireless telegraph"). On August 27, their signal transmission arrived at the imperial seaman station ** on the opposite side of the [Jungfernsee](/wiki/Jungfernsee "Jungfernsee") at Swan Alley in Potsdam 1\.6 km away . [A commemorative plaque](/wiki/Atlasplatte_am_Campanile_der_Heilandskirche_in_Sacrow.jpg "Atlasplatte am Campanile der Heilandskirche in Sacrow.jpg") that was put up in 1928 by  over the entrance door to the Campanile alludes to this incident. In the middle of the plaque, which is made of green [dolomite](/wiki/Dolomite_%28rock%29 "Dolomite (rock)"), is [Atlas](/wiki/Atlas_%28mythology%29 "Atlas (mythology)") supporting the globe, surrounded by lightning and the commemoration: "An dieser Stätte errichteten 1897 Prof. Adolf Slaby und Graf von Arco die erste Deutsche Antennenanlage für drahtlosen Verkehr." (*At this spot in 1897, Prof. Adolf Slaby and Graf von Arco erected the first German antenna for wireless communication.*)


Why was a second bell confiscated in 1917?