Cistern of the Hebdomon
... that Istanbul's Byzantine Cistern of the Hebdomon has been used, at times, as an elephant stable, a vegetable garden, and a concert arena?
... that Istanbul's <a href="./Byzantine_Empire" id="mwNw" rel="mw:WikiLink" title="Byzantine Empire">Byzantine</a> <b id="mwOA"><a href="./Cistern_of_the_Hebdomon" id="mwOQ" rel="mw:WikiLink" title="Cistern of the Hebdomon">Cistern of the Hebdomon</a></b> has been used, at times, as an elephant stable, a vegetable garden, and a concert arena?