Berlin’s world-famous Pergamon Museum, which is closed for several years of renovation work, is seeking to maintain its presence through international collaborations, one of the museum’s directors said on Friday during a tour of the construction site. “We want to remain visible,” said Barbara Helwing, director of the Near East Museum. Cooperation with other Berlin museums are already planned. Discussions were also under way about loans to institutions such as the Louvre in Paris, the Metropolitan Museum in New York, the J. Paul Getty Museum in Los Angeles and the British Museum in London. The …