One of my last classes as a CZT  before the Corona Epidemic knocked down our social life was a class of Grey Tiles. I wanted to introduce t...

We have Sunday, March, 22th. The crisis of the Corona virus is the hardest challenge in our lives we could imagine so far. We are not allo...

Additional Note Summer 2026: all my tangle are now present on my website:                         https://www.tangle-   dresden.de/uber-mich...