Complex sentence: The altarpiece was carved by the German sculptor, Veit Stoss, between 1477 and 1489, and cost over two thousand gulden, which were funded by the citizens of Krakow.
Split into simpler sentences: The altarpiece was carved by the German sculptor, Veit Stoss, between 1477 and 1489. The costs, over two thousand gulden, were funded by the citizens of Krakow.