Lowell followed Life Studies with Imitations (1961), a volume of loose translations of poems by classical and modern European poets, including Rilke, Montale, Baudelaire, Pasternak, and Rimbaud, for which he received the 1962 Bollingen Poetry Translation Prize.
However, critical response to Imitations was mixed and sometimes hostile (as was the case with Vladimir Nabokov's public response to Lowell's Mandelstam translations).
In a review of Lowell's Collected Poems, the poet Michael Hofmann wrote that although he thought Life Studies was Lowell's best book, Imitations was Lowell's most "pivotal book," arguing that the book "marks the entry into his work of what one might term 'international style', something coolly open to not-quite-English."
In the book's introduction, Lowell explained that his idiosyncratic translations should be thought of as "imitations" rather than strict translations since he took many liberties with the originals, trying to "do what [his] authors might have done if they were writing their poems now and in America."

Also in 1961, Lowell published his English translation of the French verse play Phèdre by 17th century playwright Jean Racine.
Lowell changed the spelling of the title of the play to Phaedra.
This translation was Lowell's first attempt at translating a play, and the piece received a generally positive review from The New York Times.
Broadway director and theater critic Harold Clurman wrote that Lowell's Phaedra was "a close paraphrase of Racine with a slightly Elizabethan tinge; it nevertheless renders a great deal of the excitement--if not the beauty--which exists in the original."
Clurman accepted Lowell's contention that he wrote his version in a meter reminiscent of Dryden and Pope, and while Clurman conceded that the feel of Lowell's version was very different from the feel of French verse, Clurman considered it to be like "a finely fiery English poem," particularly in passages where "Lowell's muse took flame from Racine's shade."

Lowell's next book of original verse For the Union Dead (1964) was widely praised, particularly for its title poem, which invoked Allen Tate's "Ode to the Confederate Dead."
Helen Vendler states that the title poem in the collection "honors not only the person of [the Civil War hero] Robert Gould Shaw, but also the stern and beautiful memorial bronze bas-relief [depicting Shaw and the all-black 54th Massachusetts Volunteer Infantry Regiment] ... which stands opposite the Boston State House."
Paula Hayes observes that, in this volume, "Lowell turned his attention toward ecology, Civil Rights, and labor rights ... often to the effect of combining the three concerns."
For the Union Dead was Lowell's first book since Life Studies to contain all original verse (since it did not include any translations), and in writing the poems in this volume, Lowell built upon the looser, more personal style of writing that he had established in the final section of Life Studies.
Lowell also wrote about a number of world historical figures in poems like "Caligula," "Jonathan Edwards in Western Massachusetts," and "Lady Raleigh's Lament," and he combined personal and public concerns in poems like the title poem and "Fall 1961" which addressed Lowell's fear of nuclear war during the height of the Cold War.

In 1964, Lowell also wrote three one-act plays that were meant to be performed together as a trilogy, titled The Old Glory.
The first two parts, "Endecott the Red Cross" and "My Kinsman, Major Molineux" were stage adaptations of short stories by Nathaniel Hawthorne, and the third part, "Benito Cereno," was a stage adaptation of a novella by Herman Melville.
The Old Glory was produced off-Broadway at the American Place Theatre in New York City in 1964 and directed by Jonathan Miller.
It won five Obie Awards in 1965 including an award for "Best American Play."
The play was published in its first printing in 1965 (with a revised edition following in 1968).

In 1967, Lowell published his next book of poems, Near the Ocean.
With this volume, Lowell returned to writing more formal,
Lowell followed Life Studies with Imitations (1961), a volume of loose translations of poems by classical and modern European poets, including Rilke, Montale, Baudelaire, Pasternak, and Rimbaud, for which he received the 1962 Bollingen Poetry Translation Prize. However, critical response to Imitations was mixed and sometimes hostile (as was the case with Vladimir Nabokov's public response to Lowell's Mandelstam translations). In a review of Lowell's Collected Poems, the poet Michael Hofmann wrote that although he thought Life Studies was Lowell's best book, Imitations was Lowell's most "pivotal book," arguing that the book "marks the entry into his work of what one might term 'international style', something coolly open to not-quite-English." In the book's introduction, Lowell explained that his idiosyncratic translations should be thought of as "imitations" rather than strict translations since he took many liberties with the originals, trying to "do what [his] authors might have done if they were writing their poems now and in America."
Also in 1961, Lowell published his English translation of the French verse play Phèdre by 17th century playwright Jean Racine. Lowell changed the spelling of the title of the play to Phaedra. This translation was Lowell's first attempt at translating a play, and the piece received a generally positive review from The New York Times. Broadway director and theater critic Harold Clurman wrote that Lowell's Phaedra was "a close paraphrase of Racine with a slightly Elizabethan tinge; it nevertheless renders a great deal of the excitement--if not the beauty--which exists in the original." Clurman accepted Lowell's contention that he wrote his version in a meter reminiscent of Dryden and Pope, and while Clurman conceded that the feel of Lowell's version was very different from the feel of French verse, Clurman considered it to be like "a finely fiery English poem," particularly in passages where "Lowell's muse took flame from Racine's shade."
Lowell's next book of original verse For the Union Dead (1964) was widely praised, particularly for its title poem, which invoked Allen Tate's "Ode to the Confederate Dead." Helen Vendler states that the title poem in the collection "honors not only the person of [the Civil War hero] Robert Gould Shaw, but also the stern and beautiful memorial bronze bas-relief [depicting Shaw and the all-black 54th Massachusetts Volunteer Infantry Regiment] ... which stands opposite the Boston State House." Paula Hayes observes that, in this volume, "Lowell turned his attention toward ecology, Civil Rights, and labor rights ... often to the effect of combining the three concerns." For the Union Dead was Lowell's first book since Life Studies to contain all original verse (since it did not include any translations), and in writing the poems in this volume, Lowell built upon the looser, more personal style of writing that he had established in the final section of Life Studies. Lowell also wrote about a number of world historical figures in poems like "Caligula," "Jonathan Edwards in Western Massachusetts," and "Lady Raleigh's Lament," and he combined personal and public concerns in poems like the title poem and "Fall 1961" which addressed Lowell's fear of nuclear war during the height of the Cold War.
In 1964, Lowell also wrote three one-act plays that were meant to be performed together as a trilogy, titled The Old Glory. The first two parts, "Endecott the Red Cross" and "My Kinsman, Major Molineux" were stage adaptations of short stories by Nathaniel Hawthorne, and the third part, "Benito Cereno," was a stage adaptation of a novella by Herman Melville. The Old Glory was produced off-Broadway at the American Place Theatre in New York City in 1964 and directed by Jonathan Miller. It won five Obie Awards in 1965 including an award for "Best American Play." The play was published in its first printing in 1965 (with a revised edition following in 1968).
In 1967, Lowell published his next book of poems, Near the Ocean. With this volume, Lowell returned to writing more formal,
Robert Lowell