Lucien Armand Marco den Arend (born 15 December 1943) is a geometric abstract sculptor.

In the early 1970s he met Henry Moore three times during his trips to Forte Dei Marmi, where he worked at Henraux Stone Yards in Querceta, Italy.

From the early 1970s he was active in various artists' associations, advisory committees for public art in Amsterdam, Rotterdam and other municipalities in the Netherlands.

In the Drechtsteden Area he realized his plan for an international sculpture park, OPAM, which was opened by Queen Beatrix of the Netherlands in 1996.

In 2004 he started the organization of his second international sculpture park FOAM (Finnish Open Air Museum) in Finland to which country he moved in 2003.

He now lives and works in Kangasniemi, Finland, where a collection of his sculptures is permanently exhibited on the grounds of Penttilä, an old estate in the Saimaa Lake District.