Dicke Eiche, Natural monument in Kottenforst, Bonn, Germany.

Dicke Eiche is a protected natural monument in the Kottenforst forest, on the Communicationsweg between Röttgen and Villiprott in Bonn. The oak, about 300 years old, fell under snow load in December 2010 and was propped up on supports in 2011 so the wood would rot more slowly.

The oak, roughly 300 years old, stood on the Communicationsweg between Röttgen and Villiprott. In 1993 Jochen Borchert, then Federal Minister for Food, Agriculture and Forestry, took on a tree sponsorship organised by the Kuratorium alte liebenswerte Bäume in Deutschland. In December 2010 the tree fell under the weight of snow; in 2011 it was propped up so the wood would not rot quickly and the oak could be kept longer as a natural monument.

The name Dicke Eiche means "thick oak", referring to the trunk that made it a landmark on the Communicationsweg between Röttgen and Villiprott. In 1993 the then Federal Minister Jochen Borchert took on a tree sponsorship for the oak, arranged by the Kuratorium alte liebenswerte Bäume in Deutschland. Since the tree fell in December 2010, visitors see a propped trunk rather than a standing oak.

The tree is located in Kottenforst, a forest area with developed paths that are easy for walkers to reach. The best time to visit is in dry weather, when the forest paths are easy to walk on.

Parts of the fallen tree were carved into religious objects by a sculptor and now rest in a church in Bonn. This second life shows how the wood found new purpose after the tree collapsed.