COPENHAGEN.- The Danish queen Margrethe II is not only a queen, she is also passionately interested in the past and archaeology. Life-size photographs and the queens voice guide visitors through the exhibition. The queen has been on archaeological digs since she was a teenager in Denmark and also abroad in Italy at the end of the 1950s with her grandfather King Gustav VI of Sweden, in Nubia prior to the building of the Aswan Dam, and not least as an archaeology student at Cambridge. The Danish queen, a descendent of one of the oldest monarchies in the world, has always been interested in history and art, not only in the country she rules, but also throughout the world. Her family tree stretches way beyond Denmarks borders. She is, for example, the great-great grandchild of Queen Victoria. Margrethe II has a strong interest