Probably Todaiji, a large Buddhist temple and UNESCO World Heritage Site in Nara, Japan. The temple was established in the 8th century AD, but the main building has had to be rebuilt twice after catching fire, with the current building being completed in 1709.
Same question.
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)