An unusual Christmas tree stands under the dome on the first floor of the University Library in Olsztyn. The design consists of over 620 1.5-liter bottles, measures over 2 meters and weighs approximately 26 kg. This is how much plastic, according to data from the Polish Economic Institute, is consumed by a statistical Pole within two months. By setting up such a tree, the librarians of the University of Olsztyn wanted to support the zero-waste idea and appeal for care for the environment.

Unusual Christmas trees in the library of the University of Warmia and Mazury have been set up for 10 years - for the first time in December 2011, a Christmas tree made of books was set up. In the following years, they were built from catalogue drawers, old catalogue cards used CDs and floppy disks.

The Christmas tree made of catalogue cards has been recognized by the European Photo Forum as one of the seven most beautiful Christmas trees in the world. The British newspaper "The Guardian" spotted it and put the photo in one of the December issues.