Athens, Epicurus bought a property for his school called "Garden", which later became the name of Epicurus' school. Its members included Hermarchus, Idomeneus, Colotes, Polyaenus, and Metrodorus. Epicurus emphasized friendship as an important ingredient of happiness, and the school seems to have been a moderately ascetic community which rejected the political limelight of Athenian philosophy. They were fairly cosmopolitan by Athenian standards, including women and slaves. Community activities held some importance, particularly the observance of Eikas, a monthly social gathering. Some members were also vegetarians as, from slender evidence, Epicurus did not eat meat, although no prohibition against eating meat was made. The school's popularity grew and it became, along with Stoicism, Platonism, Peripateticism, and Pyrrhonism, one of the dominant schools of Hellenistic philosophy, lasting strongly through the later Roman Empire. Deciphered carbonized scrolls obtained from the library at the Villa of the Papyri in Herculaneum contain a large number of works by Philodemus, a late Hellenistic Epicurean, and Epicurus himself, attesting to the school's enduring popularity. Julius Caesar also leaned considerably toward Epicureanism, which led to his plea against the death sentence during the trial against Catiline, during the Catiline conspiracy where he spoke out against the Stoic Cato. His father-in-law, Lucius Calpurnius Piso Caesoninus, was also an adept of the school. In the 2nd century AD, comedian Lucian of Samosata and wealthy promoter of philosophy Diogenes of Oenoanda were prominent Epicureans. By the late third century AD, however, there was little trace of its existence. With growing dominance of Neoplatonism and Peripateticism, and later, Christianity, Epicureanism declined. Philosophy Physics Epicurean physics held that the entire universe consisted of two things: matter and void. Matter is made up of atoms, which are tiny bodies that have only the unchanging qualities of shape, size, and weight. The Epicureans believed that atoms were unchanging because the world was ordered and that changes had to have specific and consistent sources, e.g. a plant species only grows from a seed of the same species,but that in order for the universe to persist, what it is ultimately made up of must not be able to be changed or else the universe would be essentially destroyed. Epicurus holds that there must be an infinite supply of atoms, although only a finite number of types of atoms, as well as an infinite amount of void. Epicurus explains this position in his letter to Herodotus: Moreover, the