signed with the artist's initials, inscribed and dedicated "D'abord il n'y a rien, ensuite il y a un rien profond, Puis une profondeur bleue chez Wilp! YK" on a label affixed to the reverse

dry blue pigment and synthetic resin, natural sponges and pebbles on panel

48 1/4 x 39 3/8 x 3 1/2 in. (122.6 x 100 x 8.9 cm)

Executed in 1961, this work is registered in the Yves Klein Archives under number RE 49.