koblenz, germany - 04 28 2021: view across koblenz with festung ehrenbreitstein

skyline town city coast sea horizon panorama bay landmark river hill tower mountain downtown tourism vacation koblenz germany 2021: rittersturz memorial place german constitution written hotel used rittersturzkonferenz long gone grundgesetz rhine mosel small marks north unesco world heritage mittelrheintal 2000 years history name confluentes roman times writing coblenz centuries view festung ehrenbreitstein