1Portfolios%20%3D%20%221817%22%20and%20Century%20%3D%20%2215th%20Century%22School of TournaiSchool of TournaiFrance or FlandersTextilesTapestry: Arithmetic and Astronomy with Pythagoras and Ptolemy118 1/4 x 106 1/2 in. (300.4 x 270.5 cm)...Woolca. 1450-146014501460TextilesMemorial Art Galleryxxx1928.45728.457SL128.457SL228.457SL328.457DI228.457SL4