2016 has been a year of significant art anniversaries. It was the centenary of dada, which I celebrated on this blog. It was the 500-year anniversary of the death of Hieronymus Bosch, which I celebrated by making a pilgrimage to the Noordbrabandts Museum in Den Bosch for an extraordinary exhibition. It was the (alleged) 40th anniversary of punk rock, which I marked by doing a radio interview. This year was also the anniversary of a less known figure in the history of art, Unica Zürn. Zürn…