Emanuel Sweert (1552-1612), a Dutch florist and prefect for the gardens of Emperor Rudolph II of Germany, issued his Florilegium Amplissumum et Selectissimum in 1612 at Frankfurt-am-Main, with engravings that he copied from de Bry's Florilegium of 1611, which was itself partially based on a 1608 work by Pierre Vallet. The work served as both picture-book and catalogue of plants that he stocked and sold at the Frankfurt Fair. It is, in fact, known as the first nurseryman's catalogue. Later editions were published as true florilegia for both scientists and gardeners. It is said that his handsome renderings of bulbs contributed to the European cultural and economic phenomenon known as "Tulipomania".