在南京大屠杀期间(1937年12月13日—1938年1月)留在南京,亲历南京大屠杀的外籍证人(不包括持日本国籍人士)究竟有多少?长期以来,一直是个谜。弄清这一问题,对于进一步收集证人证言资料,加强南京大屠杀史学研究,深入揭示侵华日军的暴行,以及客观公正地评价外籍人士基于国际人道? During the Nanjing Massacre (December 13, 1937 - January 1938), how many foreign witnesses (not including Japanese nationals) who had been in Nanjing during the Nanjing Massacre? It has long been a mystery. To clarify this issue, it is necessary to further collect information on witness testimony, strengthen the study of the history of the Nanjing Massacre, reveal in depth the atrocities committed by the Japanese army, and objectively and justly evaluate the basis of international humanitarianism by foreigners.