Works attributed to Seneca include a satire, a meteorological essay, philosophical essays, 124 letters dealing with moral issues, and nine tragedies. One of the tragedies attributed to him, Octavia, was clearly not written by him. He even appears as a character in the play. His authorship of another, Hercules on Oeta, is doubtful. Seneca's brand of Stoic philosophy emphasized practical steps by which the reader might confront life's problems. In particular, he considered it important to confront the fact of one's own mortality. The discussion of how to approach death dominates many of his letters.
SENECA'S TRAGEDIES
Many scholars have thought, following the ideas of the nineteenth century German scholar Leo, that Seneca's tragedies were written for recitation only. Other scholars think that they were written for performance and that it is possible that actual performance had taken place in Seneca's life time (George W.M. Harrison (ed.), Seneca in performance, London: Duckworth, 2000). Ultimately, this issue is not capable of resolution on the basis of our existing knowledge.
The tragedies of Seneca have been successfully staged in modern times. The dating of the tragedies is highly problematic in the absence of any ancient references. A relative chronology has been suggested on metrical grounds but scholars remain divided. It is inconceivable that they were written in the same year. They are not at all based on Greek tragedies, they have a five act form and differ in many respects from extant Attic drama, and whilst the influence of Euripides on some these works is considerable, so is the influence of Virgil and Ovid.
Seneca's plays were widely read in medieval and Renaissance European universities so they strongly influenced tragic drama in that time, such as Elizabethan England (Shakespeare and other playwrights), France (Corneille and Racine) and the Netherlands (Joost van den Vondel) .
Tragedies:
Hercules Furens (The Madness of Hercules)
Troades (The Trojan Women)
Phoenissae (The Phoenician Women)
Phaedra
Medea
Thyestes
Agamemnon
Oedipus
Hercules Oetaeus (Hercules on Oeta) and Octavia closely resemble Seneca's plays in style, but are probably written by a follower.
Dialogues
(40) Ad Marciam, De consolatione (To Marcia, On consolation)
(41) De Ira (On anger)
(42) Ad Helviam matrem, De consolatione (To Helvia, On consolation) - Letter to his mother consoling her in his absence during exile.
(44) De Consolatione ad Polybium (To Polybius, On consolation)
(49) De Brevitate Vitae (On the shortness of life) - Essay expounding that any length of life is sufficient if lived wisely.
(62) De Otio (On leisure)
(63) De Tranquillitate Animi (On tranquillity of mind)
(64) De Providentia (On providence)
(55) De Constantia Sapientiis (On the Firmness of the Wise Person)
(58) De Vita Beata (On the happy life)
Other
(54) Apocolocyntosis divi Claudii (The Pumpkinification of the Divine Claudius), a satirical work. {Also has references to Nero as having a longer life than Nestor at the hands of the three fates--obvious flattery.}
(56) De Clementia (On Clemency) - written to Nero on the need for clemency as a virtue in an emperor.
(63) De Beneficiis (On Benefits) [seven books]
(63) Naturales quaestiones [seven books] of no great originality but offering an insight into ancient theories of cosmology, meteorology, and similar subjects.
(64) Epistulae morales ad Lucilium - collection of 124 letters dealing with moral issues written to Lucilius.