Mies had a series of photographs taken of the building beforehand and thanks to these images, a group of Catalan architects were able to reconstruct it between 1983 and 1986.
This documentary details every innovate aspect of the pavilion, with quotes from Mies himself. Every element of the building had a purpose without the coldness of others of the era.
Innovation was the underlying theme, with opulence from the materials used (red onyx, marble and travertine.) As a lover of both Mies and the construct, I found it fascinating and learnt a lot from it.