charcoal, gouache, pen and graphite on paper

signed, titled, inscribed and dated 'Christo 1973 OTTERLO MASTABA (PROJECT FOR RIJKSMuseum KROLLER MULLER)' lower edge; further signed, titled, dated and dedicated 'CHRISTO 1973 OTTERLO MASTABA project in the KRÖLLER-MÜLLER Museum. TO LARS and KaRin Christo' on a letter affixed to the backing board

25.5 x 18 cm (10 x 7 1/8 in.)

Executed in 1973, this work is accompanied by a certificate of authenticity and is registered in Christo's archives.