Critic’s Notebook Moving beyond the bronze age ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Jennifer Taylor for the Boston Globe The Institute of Contemporary Art commissioned a 5,000-square-foot seascape by Matthew Ritchie to replace the Os Gemeos mural at Dewey Square. Wendy Maeda/Globe Staff Danilo Dasilva and Don Mateucci applied a white base coat over the controversial mural last Wednesday. David L. Ryan/Globe Staff Artists Steve Brettler (left) and Liam McAlpin painted Ritchie's seascape. David L. Ryan/Globe Staff The Rose Kennedy Greenway Conservancy said it wants the space "to be destination for contemporary public art." David L. Ryan/Globe Staff The mural draws inspiration from Boston's history and waterfront location. David L. Ryan/Globe Staff Work continued on Thursday as artist Lorraine Lamb painted a line. David L. Ryan/Globe Staff The conservancy will fund the $17,000 production costs of the new installation. David L. Ryan/Globe Staff Ritchie's mural will remain up for as long as 18 months. David L. Ryan/Globe Staff Ritchie was at the site Friday and discussed his work. David L. Ryan/Globe Staff He and another artist, Tricia O'Neill, painted the final block. David L. Ryan/Globe Staff The collaboration is part of a residency for Ritchie that will include a multimedia performance with members of the rock bands The Breeders and The National. David L. Ryan/Globe Staff "It's been cool for us to be part of the conversation about public art, about how you can do it in kind of an outdoor forum," Charlie McCabe, director of public programs for the conservancy, said earlier this year.