This is Roland in Zerbst in front of a Plattenbau and a bombed-out church (Nikolaikirche right off picture). Note that he has round knees and not pointy knees. There are many Rolands in the world. Roland is a statue of a knight with a drawn sword (the sword of justice) and was considered a symbol of a free city in the fifteenth century.
Der Roland in Zerbst mit bloßem Schwert vor einem Plattenbau hat keine spitzen Knien und ist eine von vielen Rolandsstatuen.