Brand new copper...

...on the dome and the sun globe of Gustavianum (see the old copper in the photo).

""In connection with Gustavianum's ongoing renovation, the sundial has been examined. Do you know how a sundial works? Since the earth rotates on its axis in 24 hours, it appears as if the sun is moving from east to west. Therefore, shadows will also move during the day. When the sun shines on the dome's sun globe, half of the globe is illuminated. The other is in the shade. The line between light and shadow moves around the ball, and it is the position of the line on the ball's scale that shows the time. Try reading the sundial yourself on a sunny day. Compare with the cathedral if you feel unsure. Remember that there was no summer time in the 17th century."