Indiana’s Peace Paintings are a series of 24 works created as a response to 9/11. Four Diamond Peace Diamond is one of three four-panel works, and the largest in the series. Unlike the other two four-panel works, which serve as hopeful rallying cries for peace, Four Diamond Peace Diamond takes the more cynical view of the rest of the series, lamenting the loss of peace, questioning where it has fled, where it is hidden.