What is klaus ottmann?

As an AI language model, I don't have access to current information about specific individuals unless it is publicly available on the internet. However, based on my research, Klaus Ottmann is a renowned curator, critic, and writer in the field of contemporary art. He has written extensively on the work of prominent artists such as James Turrell, Giuseppe Penone, and Robert Ryman and has curated exhibitions at prominent institutions such as the Phillips Collection in Washington, D.C. and the Montclair Art Museum in New Jersey.