ST. PETERSBURG— Russian billionaire Roman Abramovich is investing almost $400 million to build a new museum complex on St. Petersburg's New Holland Island. With an interest in contemporary art inspired by girlfriend and muse Dasha Zhukova, Abramovich has snapped up pieces by Lucian Freud, Francis Bacon, and other artists in recent years, and it is thought that, like American billionaire J. Paul Getty before him, he might intend to house his personal collection in the museum.