One of the biggest sticking points was the use of concrete, which some residents found ugly and drab, Barbara Laber said. He may have been seeking to make time itself more concrete, more tangible, Schlecht said. In the late 20th century, Laber was not the only German artist exploring time’s reach across generations. Since then, several other long-term art projects have begun across Europe and beyond. But Michael Münker, whose day job is running a medical device firm in the Netherlands, recently established a network called L.T.A.P.

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Persons: Barbara Laber, “, Klaus Schlecht, Laber, Schlecht, Joseph Beuys, Bogomir Ecker, Michael Münker Organizations: Pyramid Foundation, Hamburger Kunsthalle Locations: Kassel, Germany, Hamburger, Hamburg, Europe, Halberstadt, Dutch, Oxfordshire, England, Texas, Netherlands