This volume presents lively and engaging articles from the lecturers and the participants of the 23rd Gökova Geometry-Topology Conference, held on the shores of Gökova Bay, Turkey, in May/June of 2016.

Topics include manifolds, special holonomy, symplectic topology, gauge theory, Lie groups, hyperkahler manifolds, and more.

The 23rd Gökova Geometry-Topology Conference was sponsored by the National Science Foundation, by the Turkish Mathematical Society, and by the European Research Council.