Tiberius succeeded to the throne in A.D. 14, and began a career of infamy. How little knowledge was likely to gain from his patronage is shown by the fact, recorded by Pliny, that the shop and tools of the artist who discovered how to make glass malleable were destroyed. Assassins and perpetrators of every abomination were the fit companions of this tyrant.

Thrasyllus, the astrologer, lived with Tiberius, who was a firm believer in the magic arts. This reign is made illustrious in the history of medicine by the work of Celsus.

Caligula, who became Emperor in A.D. 34, was guilty of the most inhuman conduct. Criminals were given to the wild beasts for their food, and even people of honourable rank had their faces branded with hot irons as a punishment by order of this mad tyrant.

Claudius, the successor of Caligula, completed some very important public works in his reign, including great aqueducts and drains, but learning was at a low ebb in his day. Claudius Etruscus, the freedman of the Emperor Claudius, erected baths referred to by Martial. The ruins of the arches of the Aqua Claudia still remain.

Thrasyllus, a son of the astrologer who lived in the time of Tiberius, is said to have predicted to Nero the dignity of the purple. Nero would have been favourably disposed towards physicians if he had heeded the advice of his tutor, Seneca, who wrote: "People pay the doctor for his trouble; for his kindness they still remain in his debt." "Great reverence and love is due to both the teacher and the doctor. We have received from them priceless benefits; from the doctor, health and life; from the teacher, the noble culture of the soul. Both are our friends, and deserve our most sincere thanks, not so much by their merchantable art, as by their frank goodwill."[2] The practice of necromancy in the time of Nero had grown to such an extent that an edict of banishment was issued against all magicians, but this did not lessen the popularity of the magicians, who indeed prospered under the semblance of persecution, and were honoured in times of public difficulty and danger. The practice of astrology came from the Chaldeans, and was introduced into Greece in the third century before Christ. It was accepted by all classes, but specially by the Stoic philosophers. In 319 B.C., Cornelius Hispallus banished the Chaldeans from Rome, and ordered them to leave Italy within ten days. In 33 B.C., they were again banished by Marcus Agrippa, and Augustus also issued an edict against them. They were punished sometimes by death, and their calling must have been lucrative to induce them to continue in spite of the severe punishments to which they made themselves liable. The penal laws against them, however, were in operation only intermittently. They were consulted by all classes, from the Emperor downwards.

There were many physicians in the reign of Nero, but none of great eminence. Andromachus was physician to the Emperor, and had the title of archiater, which means "chief of the physicians."

An account of the archiaters is of interest. The name was applied to Christ by St. Jerome. There were two classes of archiaters in time, the one class called archiatri sancti palati; the other, archiatri populares. The former attended the Emperor, and were court physicians; the latter attended the people. Although Nero appointed the first archiater, the name is not commonly used in Latin until the time of Constantine, and the division into two classes probably dates from about that time. The archiatri sancti palati were of high rank, and were the judges of disputes between physicians. The Archiatri had many privileges conferred upon them. They, and their wives and children, did not have to pay taxes. They were not obliged to give lodgings to soldiers in the provinces, and they could not be put in prison. These privileges applied more especially to the higher class. When an archiater sancti palati ceased attendance on the Emperor he took the title of ex-archiater. The title comes archiatorum means "count of the Archiatri," and gave rank among the high nobility of the Empire.

The archiatri populares attended the sick poor, and each city had five, seven or ten, according to its size. Rome had fourteen of these officers, besides one for the vestal virgins, and one for the gymnasia. They were paid by the Government for attending the poor, but were not restricted to this class of practice, and were well paid by their prosperous patients. Their office was more lucrative but not so honourable as that of the archiaters of the palace. The archiatri populares were elected by the people themselves.

Suetonius describes the treatment Nero underwent for the improvement of his voice: "He would lie upon his back with a sheet of lead upon his breast, clear his stomach and bowels by vomits and clysters, and forbear the eating of fruits, or food prejudicial to his voice." He built, at great expense, magnificent public baths supplied from the sea and from hot springs, and was the first to build a public gymnasium in Rome.

There is reason to believe that in the time of Nero there was a class of women poisoners. Nero employed one of these women, Locusta by name, and after she had poisoned Britannicus, rewarded her with a great estate in land, and placed disciples with her to be instructed in her nefarious trade.