Henk van Lier Lels, last owner of Overcingel in Assen, receives special tribute. Artist carves image into a tree on the estate

Sennema previously made a work of art in a living tree. To ensure that the beech does not get sick from this, the portrait is no larger than an A4 sheet and the intervention is no deeper than 15 centimeters. Within this format, the tree can recover effortlessly, a dendrologist (tree expert) has assured.