Об­ра­зуй­те от слова ENTERTAIN од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

However, it was never used as a fortress. In 1824, it became a place of public ______.