Question: Who composed the engraved epitaph above Lincoln's head at the Lincoln Memorial?
About the article "Lincoln Memorial", section "Statue".

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Lying between the north and south chambers is the central hall containing the solitary figure of Lincoln sitting in contemplation.
The statue was carved by the Piccirilli Brothers under the supervision of the sculptor, Daniel Chester French, and took four years to complete.
The statue, originally intended to be only tall, was, on further consideration, enlarged so that it finally stood tall from head to foot, the scale being such that if Lincoln were standing, he would be tall.
The extreme width of the statue is the same as its height.
The Georgia white marble sculpture weighs and had to be shipped in 28 separate pieces.
The statue rests upon an oblong pedestal of Tennessee marble high, wide, and deep.
Directly beneath this lies a platform of Tennessee marble about long, wide, and high.
Lincoln's arms rest on representations of Roman fasces, a subtle touch that associates the statue with the Augustan (and imperial) theme (obelisk and funerary monuments) of the Washington Mall.
The statue is discretely bordered by two pilasters, one on each side.
Between these pilasters and above Lincoln's head stands the engraved epitaph, composed by Royal Cortissoz, shown in the box to the left.
The tomb is in the center of a 12½ acre (51,000 m²) plot.
Constructed of Massachusetts granite, it has a rectangular base surmounted by a -high obelisk and a semicircular entrance way.
A bronze reproduction of sculptor Gutzon Borglum's head of Lincoln in the U.S. Capitol rests on a pedestal in front of the entrance way.
Four flights of balustraded stairs—two flanking the entrance at the front and two at the rear—lead to a level terrace.
The balustrade extends around the terrace to form a parapet.
Originally open to the public, the terrace has since been closed due to safety concerns.
In the center of the terrace, a large and ornate base supports the obelisk.
On the walls of the base are 37 hewn stones, cut to represent raised shields, each engraved with the name of a State at the time the tomb was built.
Each shield is connected to another by two raised bands, and thus the group forms an unbroken chain encircling the base.
Four bronze statues adorn the corners of the latter.
They represent the infantry, navy, artillery, and cavalry of the Civil War period.
In front of the obelisk and above the entrance stands a full-length statue of Lincoln.
The interior of the memorial, constructed of marble from Minnesota, Missouri, Massachusetts, Arkansas, Utah, Italy, Spain, France, and Belgium, contains a rotunda, a burial room, and connecting corridors.
A replica of the Daniel Chester French statue in the Lincoln Memorial, in Washington, D.C., dominates the entrance foyer.
The walls of the rotunda are decorated with 16 marble pilasters, which are separated by marble panels.
The pilasters symbolize Lincoln and the 15 Presidents who preceded him.
The room also contains 36 bronze panels, one for each State at the time of Lincoln's death.
The ceiling is of palladium leaf.
Corridors lead from the rotunda to the burial room at the rear of the memorial.
Located in niches along the corridor walls are eight statues by prominent sculptors depicting various phases of Lincoln's life.
Four bronze tablets on the walls are engraved with theFarewell Address, the Gettysburg Address, a portion of the second inaugural address, and a biographical sketch.
Large gold stars in sets of 12 at each corner of the memorial represent the 48 States in the Union at the time of its remodeling.
The burial room features black and white marble walls and a ceiling of gold leaf.
At its center stands the cenotaph, a 7-ton block of reddish marble inscribed with Lincoln's name and the years he lived.
It marks the approximate location of the burial vault, which is 30 inches behind and 10 feet below.
Nine flags are arranged in a semicircle around the cenotaph.
Seven of them—the State flags of Massachusetts, New Jersey, Pennsylvania, Virginia, Kentucky, Indiana, and Illinois—commemorate the homes of Lincoln and his ancestors.
The eighth and ninth are the Stars and Stripes and the Presidential flag.
The inscription "Now he belongs to the ages," reputedly spoken by Secretary of War Edwin M. Stanton at the time of Lincoln's death, is inscribed in the wall above the U.S.
Flag.
Along the south wall of the burial room are four crypts containing the remains of Mrs. Lincoln and three of Lincoln's four sons (his eldest, Robert Todd Lincoln, is buried at Arlington National Cemetery).
The tomb was built with additional crypts for members of Lincoln's family in addition to the four spaces already used.
However, as the remaining members of Lincoln's family decided not to be buried at the tomb, the other crypts remain empty. 
Abraham Lincoln.
Lincoln on commemorative Issues.
Except for the memorial stamp of 1909, designed to simulate a definitive issue, Abraham Lincoln did not appear on a commemorative issue until the U.S. Post office issued the Chinese resistance issue in 1942.
The first president to appear on a US commemorative Postage stamp was Thomas Jefferson, displayed above.
* On July 7, 1942, the U.S. Post Office issued a 5c postage stamp commemorating the fifth anniversary of Chinese resistance to Japanese oppression as a tribute to China and its struggle to preserve a free government.
The design of this issue depicts a map of China with an image of the sun, national symbol of China, superimposed on the map.
Portraits of Abraham Lincoln and Sun Yat-sen, first president of the Republic of China, are on either side of the stamp.
* On November 19, 1948, eighty-five years to the day after President Abraham Lincoln delivered his most famous speech, the US Post Office released the commemorative Gettysburg Address issue.
Lincoln delivered the "Gettysburg Address" at the dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania, on Thursday, November 19, 1863, four and a half months after Union armies defeated those of the Confederacy at the Battle of Gettysburg, the turn of the American Civil War.
Lincoln Sesquicentennial IssueThe US Post Office issued a series of four commemorative stamps during 1958 and 1959 in honor of the 150th anniversary of Abraham Lincoln's birth in 1809.
The four stamps were modeled after various famous works of art.
The 1c green Lincoln issue was first released to the public on February 12, 1959, the 150th anniversary of Lincoln's birth in 1809, in Hodgenville, Kentucky, near the place of Lincoln's birth.
The engraving is modeled after a painting by George Healy.
Robert L. Miller of the Bureau of Engraving and Printing modeled the overall stamp design.
The 1-cent Lincoln stamp features the famous "Beardless Lincoln" portrait painted by Healy from life in 1860 in Springfield, Illinois, shortly after Lincoln was elected president.
The 4c Lincoln-Douglas debate postage stamp was first issued on August 27, 1958 at Freeport, Illinois.
This issue was the first in the series and was first released on the 100th anniversary of the Lincoln-Douglas debates.
The engraved image is modeled after a painting by Joseph Boggs that portrays Lincoln addressing an outdoor crowd with Douglas standing behind him.
Artist William K. Schrage of the Bureau of Engraving and Printing based the stamp design on work done by Ervine Metzl of New York City.
The US Post Office issued the blue 4-cent Lincoln stamp on May 30, 1959 It was one of four Lincoln Birth Sesquicentennial commemorative stamps first issued through the Washington, DC, Post Office.
The issue features a portion of a famous statue sculpted by Daniel Chester French, which sits in the Lincoln Memorial in Washington, DC.
On February 27, 1959, the US Post Office issued the 3c Lincoln Birth Sesquicentennial commemorative stamp, the third in the series of four, first issued through the New York, New York, post office.
The stamp features a sculptured bust of Lincoln by Gutzon Borglum.
Done in marble in 1906, it now stands in the rotunda of the Capitol in Washington, DC.
On October 16, 1984, the US Post office issued its 20c commemorative postage stamp commemorating the theme "A Nation of Readers".
The First Day Ceremony took place in Washington, DC, in the Coolidge Auditorium of the Library of Congress.
The issue was designed by Bradbury Thompson of Riverside, Connecticut, who based the design on a photograph by renown Civil War photographer Mathew Brady which shows Abraham Lincoln reading from a book to his son Thomas.
The Postal Service issued a 20 stamp sheet of 32-cent Civil War stamps on June 29, 1995 in Gettysburg, Pennsylvania.
Designed by Mark Hess of Katonah, New York, the stamps are the second installment of the Classic Collection.
This issue depicts Lincoln with the Capitol under reconstruction in the background.
Text about Lincoln is on the back this issue.
Lincoln also appears once in the AMERIPEX presidential series, 36 commemorative stamps, issued by the Post Office on May 22, 1986.
<br>Lincoln 200th Anniversary of birth commemorative issues  On February 9, 2009, the 200th anniversary of Abraham Lincoln's birth, the US Post office in Springfield, Illinois, first issued a set of four commemorative issues portraying Lincoln at different periods in his life.
Lincoln's portrayal and stamp artwork was created by artist Mark Summers of Waterdown, Ontario, Canada.
The background depicted in the stamps are taken from famous themes, i.e.
The Lincoln and Douglas debates.  
Dr. Barrows claimed that Abraham Lincoln had become a Christian without providing any evidence.
In the "Lincoln Memorial Album", following Lincoln's assassination, Dr. Barrows wrote a few comments about Lincoln's religion: 
In 1876, as the nation celebrated its centennial, a gang of counterfeiters based out of Chicago concocted a plan to steal Lincoln's body from the tomb and hold it hostage in exchange for a pardon for their imprisoned engraver and a cash reward.
On the morning of November 7, Power was visited by Secret Service detective Patrick D. Tyrrell, who told the custodian of what he had learned of the plot, and asked for his assistance in arranging the stakeout; Power agreed without hesitation.
That afternoon, two of the grave robbers, Jack Hughes and Lewis Swegles, visited the tomb and received the guided tour, not realizing that Power was aware who they were and what they planned.
That night, Power and the detectives waited in the Memorial Hall until tipped off by Swegles, who was Tyrrell's informant; though the criminals escaped, the detectives were successful in preventing the theft of the body.
Disturbed by how close the grave robbers had come to stealing Lincoln's remains, Power and John Todd Stuart, Mary Todd Lincoln's cousin and head of the Lincoln Monument Association, both agreed that Lincoln's body had to be hidden, and thus the coffin was carried into the basement.
On February 12, 1880, on what would have been Lincoln's 71st birthday, Power and his associates formed into what became known as the "Lincoln Guard of Honor", with Power serving as secretary; the organization was formed both for public ceremonies at Lincoln's tomb, as well as the private work of protecting the remains of the President and his family.