Question: Who created the epitaph engraved right over Lincoln's head at his Memorial?
About the article "Lincoln Memorial", section "Statue".

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On May 18, 1995, Godunov's friends became concerned when he had been uncharacteristically quiet with his phone calls.
A nurse who had not heard from him since May 8 went to his home in the Shoreham Towers, West Hollywood, California, where his body was discovered.
Godunov's death was later determined to be caused by complications from hepatitis due to chronic alcoholism.
His ashes were scattered into the Pacific Ocean; his memorial at Gates Mortuary in Los Angeles is engraved with the epitaph "His future remained in the past."
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. 
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.
Martel served on the Board of Directors of the University of Connecticut Alumni Association and chaired the Advisory Board of its College of Liberal Arts and Sciences.
He is on the graduate faculty at Temple University.
Lecture series at both the University of Connecticut and Temple University were created in his name.
In 2007, Martel initiated and led a University of Connecticut Alumni Association project to build a memorial honoring the university's students who have died while serving the United States during wartime.
"The Ultimate Sacrifice Memorial" was completed in 2008 and stands on the college's main campus in Storrs, CT.
In 2013 to celebrate the 150th anniversary of Abraham Lincoln's Gettysburg Address, Martel chairs the "In Lincoln's Footsteps" speech contest. 
The memorial statue of Duke Magnus II von Mecklenburg (died 1503) is said to be the most complete form of an epitaph.
In his right hand he holds a dagger and wound around his head is a death bandage.
Magnus was an energetic ruler, enacting fundamental land reforms which showed his farsightedness concerning economic and financial matters.
Two similar statues are on display in front of the Pribislav chapel.