Stundeneiche, Historic oak tree site near Ludwigsfelde, Germany

The Stundeneiche was a roughly 150-year-old oak that stood for over half a century at kilometre 82 of the A10, the Berliner Ring built in 1938, on the narrow central reservation between Ludwigsfelde and the Nuthetal interchange. When the motorway was widened to six lanes after reunification, the crash barriers were bent in a slight curve around the trunk to keep it standing. It was felled on 7 May 2004 because it was hollow inside and in danger of losing its footing; the trunk measured over a metre across, was five metres long and weighed six tonnes.

The oak received its name because it marked approximately one hour of travel time from Brandenburg to East Berlin, serving as a key reference point during the German Democratic Republic period. This role as a temporal landmark reflects the region's transportation history and the importance of travel distance measurement in that era.

The sculpture named Stundeneiche was unveiled on 9 May 2005 on Ludwigsfelde's Rathausplatz, opposite the Kulturhaus, by infrastructure minister Frank Szymanski, mayor Heinrich Scholl and the artist. The 5.30-metre work consists of two "burnt and oiled" sections with smooth inner faces standing about half a metre apart. The town and the housing company Märkische Heimat paid for the installation; Brandenburg contributed 5,000 euros from lottery funds.

The sculpture stands on Ludwigsfelde's Rathausplatz, opposite the Kulturhaus, where it occupies a position as conspicuous as the oak once did on the motorway. Its two halves face each other across a gap of about half a metre, with smooth-worked inner surfaces; the outer surfaces are burnt and oiled. The town and the housing company Märkische Heimat paid for the installation, and the state of Brandenburg contributed 5,000 euros from lottery funds.

The sculpture's two halves stand about half a metre apart, their inner faces smoothed, and the piece is 5.30 m tall. It was unveiled on 9 May 2005, a year after the felling, by infrastructure minister Frank Szymanski, mayor Heinrich Scholl and the artist. The state of Brandenburg funded it with 5,000 euros from lottery money.