Willys de Castro: Architect of Active Space Willys de Castro (February 16, 1926 – June 5, 1988) was a Brazilian visual artist whose work fundamentally challenged the traditional boundaries between painting and sculpture. Born in Cuiabá, Brazil, he emerged as a pivotal figure within the Neo-Concrete movement, a radical artistic current that arose in São Paulo during the late 1950s. De Castro’s legacy lies not just in his individual cre…