the oldest

remains, ruins of ancient buildings etc.

revival

revive

move, change over

Clipping of マイクロフォン (maikurofon, “microphone”); a mic / Clipping of マイクロホン (maikurohon, “microphone”); a mic

the opening of a 館 (kan) on a given day - library (図書館), museum (博物館), hall (会館), etc. / the first opening of such a facility

to open a 館 (kan) for the day - library (図書館), museum (博物館), hall (会館), etc. / to open such a facility for the first time

reconsideration

reconsider