metaphysical poetry, of which he was the great ornament, has progressed from being considered an oddity, a crank taste, to being seen as one of the great periods of our poetry.

시에 있어 중요한 시기들 중의 하나로 보여지는 형이상학적인 시 of which he was the great ornament,
이상한 것, 즉 괴짜 취향으로 간주되는 것으로부터 발전해왔다.

여기서 of which he was the great ornament 를 어떻게 해석해야하나요??

그리고 to being seen as one of the great periods of our poetry 이게 metaphysical poetry (형이상학적인 시)를 꾸미는 게 맞나요??