The Renaissance series of roses is developed by Poulsen's of Denmark. These are Modern Old Fashioned roses that have been bred for health, beauty, sturdy growth, and fragrance. As part of their testing program, Poulsen does not spray its roses. Only those varieties that pass this test are entered into further trials.
[From Arena Rose Co.'s Catalog 2000, p. 2:] Building upon the success of their Towne & Country landscape roses, Poulsen has also launched the Renaissance shrub rose series.