The recovery of Greek mathematics in Europe began in the 12th century, when Latin translations of Greek works were made in Spain and southern Italy, mainly from the Arabic but sometimes from the Greek as well. New or improved versions appeared from Renaissance times onwards; sometimes Arabic manuscripts extant in European libraries were used as well. The last major original edition of a treatise in the Greek language was undoubtedly that of the palimpsest containing Archimedes' Method by Heiberg in the first years of the 20th century.