Here we are at the Rapperswil Castle on the Lindenhof.

The medieval Altstadt of the city of Rapperswil is dominated by the castle perched atop a longish rocky hill on the peninsula called Lindenhof hill on its western side respectively Herrenberg on its eastern side where the castle was built. It is surrounded on three sides by the Lake Zürich and by those upper section on the northwestern Seedamm area. Thus, the castle was well protected, dominating the old town of Rapperswil, and controlling the water way between Walensee and Lake Zürich on its most narrow part, as well as the medieval Gotthard Pass route between Lombardy and Zürich, and the Jakobsweg (Way of St. James) to the Einsiedeln Abbey. From  https://en.wikipedia.org/wiki/Rapperswil_Castle