GEWANDHAUS CONCERTS, famous concerts given at Leipzig, probably those of the oldest standing in existence, since they date back to the time when Bach was cantor of the Thomas schule. They acquired special fame under Mendelssohn (1835– 43 ), while other conductors have included Niels Gade , K. Reinecke (186o-95), Arthur Nikisch (1895-1922) and W. Furtwangler, their present director.