Hessenberg varieties 2018 in Osaka [at Osaka City University] (2018/12/12 - 12/14)
Hessenberg Varieties in Combinatorics, Geometry and Representation Theory [at Banff International Research Station] (2018/10/21 - 10/26)
Workshop on Recent Developments in the Geometry and Combinatorics of Hessenberg Varieties [at Fields Institute] (2015/7/22 - 7/24)