Penicillin nontoxic in humans by first performing toxicity tests in animals and then on humans. His subsequent experiments on penicillin's response to heat and pH allowed Fleming to increase the stability of the compound. The one test that modern scientists would find missing from his work was the test of penicillin on an infected animal, the results of which would likely have sparked great interest in penicillin and sped its development by almost a decade. The importance of his work has been recognized by the placement of an International Historic Chemical Landmark at the Alexander Fleming Laboratory Museum in London on
Saint Valentine that in England no church was ever dedicated to him. There are many churches containing the name of Valentine in other countries such as Italy. A 5th- or 6th-century work called "Passio Marii et Marthae" made up a legend about Saint Valentine's Basilica being dedicated to Saint Valentine in Rome. A later "Passio" repeated the legend and added the adornment that Pope Julius I (357–352) had built the ancient basilica "S. Valentini extra Portam" on top of his sepulchre, in the Via Flaminia. This church was really named after a 4th-century tribune called Valentino, who donated the land on which