Spending time with friends from out of town is wonderful for many reasons. For example, it provides an occasion to explore the city. Last week we went to the Albertina, a truly amazing art museum. Its collection includes Albrecht Dürer’s Young Hare, a painting that dates back to 1502. Seeing the original, which is half a millennium old, is just mind-blowing. Pretty much everyone in Austria is familiar with it, as the image is featured on the drawing pads that children use in school. The painting is usually in storage, but we got lucky to visit the museum during one of the rare occasions when the original was on display. This exhibit was announced by modern sculptures of rabbits popping up in the neighborhood of the museum, which I thought was very cool.