- Vernissage, Sat. April 18th, 2026, 6pm
open: fridays, 3 – 7 pm and by appointment
- 8th of May: 6pm, “The Karl Liebknecht Performance”, Lecture by Manfred Kirschner and “Revolutionaries—then and now. Loud and visible! FEMINIS-MUSS!” Lecture by BeaF.
- May 17th, Finissage with “Torte und Musik”
with: Julianne Cordray, Zoe la Mar, artists of the Gretl.Wand project, Manfred Kirschner, Jürgen Rudy, Erifyli Theofilou, Chris Zschaber and others



Over the years, the Crystal Ball exhibition space has provided a venue for numerous presentations and related performances showcasing wool as a material and its low-threshold design aspects. Examples include the fashion show developed by Monika Müller Kroll, in which she sewed couture from her grandmother’s woolen works recycled from industrial threads. Or Astrid Küver’s seemingly endless series of crochet pictures, Francoise Cactus’ wonderful three-dimensional crochet portraits of famous pop stars, or Elke Graalfs’ expansive knitted paintings on the walls of the exhibition space.
Wool is an inexpensive basic material whose low-threshold, diverse design possibilities attract professionals and amateurs alike. The great wool wave may seem to be over, but political wool work nevertheless stands out as a new personal and social impulse. And documenta-participant Jürgen Rudy’s abstract, organically conceived works also hold a special place.
The concept includes the exhibition series “Gretl-Wand” (Gretl Wall), curated by Zoe la Mar over many years, which brings together works by almost 39 artists in three wool friezes and is to be reinstalled on the three walls of the exhibition space.
The tenderly political wool space is completed by the “Kunsttheorieuntersetzer” (Art Theory Kettleholder), an oversized pot holder made of wool in progress by Manfred Kirschner, which serves as a give space to groups of people, i.e., humans, and bring them together.
The Art Theory Kettleholders are a series of crocheted works whose purpose is to offer space for interpretations, meanings, and theories as an artistic ‘product’ and thus to refer to art and its social and commercial function as a “self-aware” work of art.
This constructed, colorful, pop-art “crochet room” of opinions, slogans, and calls for peace becomes a pacifist and cozy relaxation space with pillows, blankets, and books. The wool-filled space is complemented by the extraordinary, fascinating works of Jürgen Rudy, who, with uninhibited freedom, has created crocheted and knitted pictures, capes, dresses, and objects that are truly one-of-a-kind. The artist’s works emerge from his powerful intuition, which already imbues them with a diverse adaptability within the organic creative process, thus transforming them into cross-media works of art. In a video, the artist will be seen in a performance featuring his works.
Jürgen Rudy: Untitled, Foto: Tobias Hübel
Jürgen Rudy: Performance, 2020 Foto: Bildnerische WerkstattHowever, in addition to this function as a contemplation, reading room, and safe space, the aforementioned crocheted slogans also reflect, in historical comparison, slogans from the verbal and visual contributions of the planned lectures for May 1, which we bring together in lecture performances. For example, Karl Liebknecht’s cries on Potsdamer Platz on May 1, 1916: “Down with the war!”, for which he was arrested, take on a temporal, current dimension with the threat of war and territorial appropriation in the current political world situation. The preceding quote is part of the “Karl Liebknecht Performance,” a lecture by Manfred Kirschner about that very historical demonstration and the later planned Liebknecht monument and its only realized and historically contested monument pedestal and his only realized and historically contested monument pedestal at Potsdamer Platz. Also BeaF. Will hold a lecture about FeminisMuss.
In addition to these lectures, simple readings by our readers of historical and scientific texts as well as prose are also part of our concept. The tender, political crochet room also offers books to look at and read for yourself. Electronic media are also permitted, but should not be the main focus. There is also the opportunity to actively participate in the space by crocheting, with visitors doing their own handicrafts and further developing the installation through their work. Wool and knitting and crochet needles are provided for this purpose.
Crystal Ball sees itself as a space that combines the communication and discourse of cultural history in the context of the peace and labor movements, reflects on historical scenarios of world history in their personal dimension, and creates a place of tranquility, meditation, and education to bring people together in peaceful communication and forge new connections, synergies, and perspectives.
Gretl.Wand: Künstler:innen:
@8arms2hug @amistreetart @bri_libre @caliaf_art @cherrybombs @crochetflambe @curioussleuth @ednitalandia @fasermacka @gualacrafts @fraujuleskunst @haekelbar @haitchchamp @hanikmec
@hellothemushroom @hmsartphoto @kernmyrtle @kim.laidler@la.leti__ @linlinschoen @littlenuggetworkshop @loewenzahm1luzie @maddowhousestudios @madebyelli @margaremelmonitor79 @myrjamiart @nadelhexe_sigena @naitrose @rosesagainstviolence @saramin_haekeldesign @stitch.a.smile @stricktdagegensy @tueph_li @vihiria @welshwand @yarn_vadalette @yarnagainstpatriarchy