Stèle Oeuvre (étude et analyse) Bouddhisme Collection publique Museum of Fine Arts Boston Meiguo Boshidun meishuguan cang Bei Wei Yong’an er nian zaoxiang bei kao 美国波士顿美术馆藏北魏永安二年造像碑考 = Research on the Northern Wei Yong’an Second Year Stele Stored at the Museum of fine Art in Boston