Nowhere is this more apparent than in Richard Serra's monumental The Matter of Time (1994 — 2005), one of a number of
vast permanent installations including Jeff Koons» Puppy (1992) and Louise Bourgeois's Maman (1999).
In contrast to the deliberate subtlety of The Vertical Earth Kilometer, but conceived as a companion, The Broken Kilometer (1979) is
a vast permanent installation at 393 West Broadway in New York City, another Dia space.