Adagia (singular adagium) is the title of an annotated collection of Greek and Latin proverbs, compiled during the Renaissance by Dutch humanist Desiderius Erasmus Roterodamus.
By 1508, after his stay in Italy, Erasmus had expanded the collection (now called Adagiorum chiliades tres or "Three thousands of proverbs") to over 3,000 items, many accompanied by richly annotated commentaries, some of which were brief essays on political and moral topics.
The work continued to expand right up to the author's death in 1536 (to a final total of 4,151 entries), confirming the fruit of Erasmus' vast reading in ancient literature.
It is also an expression of the contemporary humanism; the Adagia could only have happened via the developing intellectual environment in which careful attention to a broader range of classical texts produced a much fuller picture of the literature of antiquity than had been possible, or desired[citation needed], in medieval Europe.
In a period in which sententiæ were often marked by special fonts and footnotes in printed texts, and in which the ability to use classical wisdom to bolster modern arguments was a critical part of scholarly and even political discourse, it is not surprising that Erasmus' Adagia was among the most popular volumes of the century.
Erasmus originally intended to include Biblical adages, parables and imagery, however this was too ambitious; he later addressed these with his New Testament Annotations and Paraphrases.