  We propose a sharp-interface continuum model based on a thermodynamic
variational approach to investigate the strong anisotropic effect on
solid-state dewetting including contact line dynamics. For sufficiently strong
surface energy anisotropy, we show that multiple equilibrium shapes may appear
that can not be described by the widely employed Winterbottom construction,
i.e., the modified Wulff construction for an island on a substrate. We repair
the Winterbottom construction to include multiple equilibrium shapes and employ
our evolution model to demonstrate that all such shapes are dynamically
accessible.
