Tiberius in a letter to him saith, Haec pro amicitia
nostra non occultavi; and the whole senate dedicated an altar to Friendship, as to a goddess, in respect of the great dearness of friendship, between them two.
(8.) Throughout the Middle Ages, the major classical theories of friendship from Aristotle's Nichomachean Ethics (books 8 and 9) and Cicero's De amicitia
were well known (Ullrich Langer, Perfect Friendship: Studies in Literature and Moral Philosophy from Boccaccio to Corneille [Geneva: Librairie Droz, 1994], 20-26).
Montaigne begins the essay with a meditation on friendship (drawing on the Greek and Roman concepts of philia and amicitia
In a dramatic environment in which no other social bonds seem to operate, he believes in a voluntary social group bound by philia or amicitia
, the classical ideal of friendship.
Derrida's book relies heavily not only on basic classical sources of the discussion of friendship in politics, Aristotle's Eudemian Ethics  and Nichomachean Ethics,  but also on Cicero's Laelius de Amicitia
.  In each of these classic sources, friendship is seen as a fundamental public virtue, as something that transcends both religion and citizenship and as a core value that enables the household and peer group to relate to the republic.
Carnalis: the "Friendship" of Troilus and Pandarus in Troilus and Criscyde.
"From Academia to Amicitia
: Milton's Latin Writings and the Italian Academies." Transactions of the American Philosophical Society, 88.6 (1998).
Thomas's use of amicitia
as the natural analogate for caritas (Summa Theologiae II-II, 23, 1).
The permissible ideal of male intimacy (amicitia
) was epitomized by Christ and Saint John the Evangelist, "the beloved disciple' who were paired in manuscript illuminations by the 12th century and became popular in German sculpture after 1300.
This was followed in 1481 by an edition of William Worcester's translation of Cicero's De Senectute and De Amicitia
(on Old Age and Friendship) and Tiptoft's translation of The Declamation of Noblesse.
Beeson, `The "lost" manuscript of Cicero's De Amicitia
', CP 21 (1926), 120-32.