The Kollentrollet is a monumental, 107-ton sculpture located at Gratishaugen in Holmenkollen. Designed by the renowned artist Nils Aas and constructed by the contractor Selmer Skanska, the 6.5-meter-tall troll was built over four months using a styrofoam core, an 8 mm steel reinforcement net, and sprayed concrete. Its massive 10-ton face and the accompanying baby troll were cast from molds based on a 60-centimeter original model that was digitally magnified ten times. The sculpture was generously gifted by publisher Johan H. Stenersen. Originally planned for completion in the autumn of 2001, the unveiling was delayed to coincide with Children’s Holmenkollen Day. Tragically, Stenersen passed away just two days before the ceremony on March 7th, turning the unveiling into a respectful and subdued memorial attended by family, friends, and notable public figures.