a Sinhalese poem of the 15th century a social art of the 21st century dogs in english porcelain of the 19th century The art of the 19th century impressions of the 20th century french flower painters of the 19th century Christian leaders of the 18th century Towards a better world：a Sinhalese poem of the 15th century Chinese poetry of the mid-ninth century russian cello music of the 19th century