Zachęta — National Gallery of Art owes both its seat and the mission of popularizing visual arts to the Society for the Encouragement of Fine Arts (SEFA) established 160 years ago by art enthusiasts and artists. This dedication to art resounds in the inscription “Artibus” (To the Arts) on the building’s façade. From the very beginning, this mission has included collecting contemporary art – then and today.

"Simple Rainbow" was created in 1991 for the exhibition entitled "Epitaph and Seven Spaces", curated by Janusz Bogucki and Nina Smolarz. The rainbow stood on Małachowskiego Square until 1993. After 28 years, it will reappear on the square, as a conversation starter on today’s society and world.