Washington (CNN) Congressional leaders honored the late Rep. Elijah Cummings on Thursday as his body laid in state in National Statuary Hall in the US Capitol.

Cummings, a longtime Maryland Democrat and key figure leading investigations into President Donald Trump, died last week at the age of 68. The congressman's death prompted an outpouring of grief from lawmakers on both sides of the aisle.

Cummings appears to be the first African American and African American lawmaker to lie in state in the US Capitol, according to congressional historians.

Cummings speaks with US Rep. Mark Meadows in June 2019, just after a panel voted to hold Attorney General William Barr and Commerce Secretary Wilbur Ross in contempt for failing to turn over subpoenaed documents related to the Trump administration's decision to add a citizenship question to the 2020 census.

Cummings speaks with US Rep. Mark Meadows in June 2019, just after a panel voted to hold Attorney General William Barr and Commerce Secretary Wilbur Ross in contempt for failing to turn over subpoenaed documents related to the Trump administration's decision to add a citizenship question to the 2020 census.

During a committee meeting in June 2018, Cummings asks Republican colleagues to intervene in the separation of immigrant families at the border.

During a committee meeting in June 2018, Cummings asks Republican colleagues to intervene in the separation of immigrant families at the border.

Cummings stands with Democratic presidential candidate Hillary Clinton after endorsing her at an event in Baltimore in April 2016.

Cummings stands with Democratic presidential candidate Hillary Clinton after endorsing her at an event in Baltimore in April 2016.

Cummings marches with protesters in Baltimore after authorities released a report on the death of Freddie Gray.

Cummings marches with protesters in Baltimore after authorities released a report on the death of Freddie Gray.

Cummings addresses mourners at a funeral for Freddie Gray in April 2015. Gray died after sustaining a neck injury while in police custody.

Cummings addresses mourners at a funeral for Freddie Gray in April 2015. Gray died after sustaining a neck injury while in police custody.

US Rep. Trey Gowdy confers with Cummings in January 2015, at the start of a public hearing to investigate the 2012 attacks on the US Consulate in Benghazi, Libya.

US Rep. Trey Gowdy confers with Cummings in January 2015, at the start of a public hearing to investigate the 2012 attacks on the US Consulate in Benghazi, Libya.

Cummings takes part in a walk-out outside the House of Representatives in December 2014. People gathered to protest the Eric Garner and Michael Brown grand jury decisions, which did not bring charges against the police officers involved in their deaths.

Cummings takes part in a walk-out outside the House of Representatives in December 2014. People gathered to protest the Eric Garner and Michael Brown grand jury decisions, which did not bring charges against the police officers involved in their deaths.

Cummings and his wife, Maya Rockeymoore Cummings, arrive at a state dinner hosted by Obama at the White House in February 2014.

Cummings and his wife, Maya Rockeymoore Cummings, arrive at a state dinner hosted by Obama at the White House in February 2014.

President Barack Obama shakes hands with Cummings after signing HR 4348, the Surface Transportation Bill, during a ceremony at the White House in July 2012.

President Barack Obama shakes hands with Cummings after signing HR 4348, the Surface Transportation Bill, during a ceremony at the White House in July 2012.

Cummings rearranges flowers on the stairs of the house where his nephew, Christopher Cummings, was killed in a June 2011 shooting in Norfolk, Virginia.

Cummings rearranges flowers on the stairs of the house where his nephew, Christopher Cummings, was killed in a June 2011 shooting in Norfolk, Virginia.

Retired North Carolina Supreme Court Chief Justice Henry Frye swears in Cummings, US Rep. Melvin Watt and US Rep. Corrine Brown as members of the Congressional Black Caucus in January 2005. Watt was replacing Cummings as chairman.

Retired North Carolina Supreme Court Chief Justice Henry Frye swears in Cummings, US Rep. Melvin Watt and US Rep. Corrine Brown as members of the Congressional Black Caucus in January 2005. Watt was replacing Cummings as chairman.

Viola Pearson, the widow of Levi Pearson, talks with Cummings after a ceremony honoring her husband with the Congressional Gold Medal in September 2004. Levi Pearson was among four people honored for their involvement in Briggs v. Elliott, a court case that challenged segregation in South Carolina schools.

Viola Pearson, the widow of Levi Pearson, talks with Cummings after a ceremony honoring her husband with the Congressional Gold Medal in September 2004. Levi Pearson was among four people honored for their involvement in Briggs v. Elliott, a court case that challenged segregation in South Carolina schools.

US Sen. John Kerry chats with Cummings during a ceremony in Topeka, Kansas, commemorating the 50th anniversary of Brown v. Board of Education.

US Sen. John Kerry chats with Cummings during a ceremony in Topeka, Kansas, commemorating the 50th anniversary of Brown v. Board of Education.

Cummings is seen in a yearbook photo from his senior year of high school. He graduated in 1969.

Cummings is seen in a yearbook photo from his senior year of high school. He graduated in 1969.

US Rep. Elijah Cummings is photographed in Washington in May 2019.

US Rep. Elijah Cummings is photographed in Washington in May 2019.

Lying in state is a tribute reserved for government officials and military officers, while lying in honor is a distinction given to private citizens. Two African Americans have lain in honor: civil rights icon Rosa Parks and Officer Jacob J. Chestnut Jr., a Capitol Police officer killed in the line of duty.

The formal arrival ceremony Thursday took place in Statuary Hall, an expansive room that houses a collection of statutes contributed by individual states to honor prominent individuals in their history.

House Speaker Nancy Pelosi, Senate Majority Leader Mitch McConnell, Senate Democratic Leader Chuck Schumer and other members of Congress spoke in tribute to Cummings during the ceremony.

In her remarks, Pelosi referred to Cummings as "a master of the House" and "our North Star, our guide to a better future for our children."

Pelosi described the late congressman as a generous mentor in the House in his role as Chair of the House Oversight Committee, saying, "When we were deciding committee assignments, he said give me as many freshman as you can, I love their potential, and I want to help them realize it."

McConnell spoke of Cummings' dedication to the city of Baltimore, saying, "Elijah Cummings did not just represent Baltimore. He embodied it. He celebrated its victories, sought to advocate for its needs and worked to heal its wounds."

Cummings "climbed the ranks here in the Capitol, not because he outgrew his hometown, but because he was so committed to it," McConnell said.

Schumer said that Cummings was "universally respected and admired in a divided time." The Senate Democratic leader said that the late congressman inspired "us all to be better" and that his authority "came from the moral force of his life."

GOP congressman Mark Meadows of North Carolina was visibly emotional as he spoke, saying that he was "privileged enough to be able to call him a dear friend," adding that some might find it to be "an unexpected friendship," but "for those of us who know Elijah, it's not unexpected or surprising."

"Perhaps this place and this country would be better served with a few more unexpected friendships," Meadows said. "I know I've been blessed by one."

The top congressional leaders from both chambers -- Pelosi and House GOP leader Kevin McCarthy as well as McConnell and Schumer -- took part in a wreath laying.

There was also a performance by the choir for Baltimore's Morgan State University, where Cummings served as a member of the board of regents.

A public viewing followed the ceremony with members of the public permitted to pay respects to the late congressman from 1 to 7 p.m. ET.

A funeral service will be held for Cummings on Friday at New Psalmist Baptist Church in Baltimore. According to a release from the late congressman's office, speakers at the service will include former President Barack Obama, along with former President Bill Clinton and former secretary of state Hillary Clinton, as well as Speaker Pelosi.

A public viewing and celebration in honor of Cummings were also held Wednesday at Morgan State.

Pelosi appeared visibly emotional last Thursday as she paid tribute to Cummings after his death.

"He was a leader of towering character and integrity," the Speaker said, "He lived the American dream. "

Cummings was born and raised in Baltimore, the city that is home to his district. The son of former sharecroppers was born in 1951.

He practiced law and served for 14 years in the Maryland House of Delegates, where he became the first African American in Maryland history to be named speaker pro tem, according to his congressional website

He had represented Maryland's 7th Congressional District since 1996 and served as the chairman of the House Oversight and Reform Committee, one of the panels involved in the Trump impeachment inquiry.

In that role, Cummings oversaw a range of investigations into the administration, from issues relating to the impeachment inquiry to the treatment of migrants at the southern border.

As he led the investigative efforts, Cummings clashed publicly with the President. But despite being an outspoken and passionate defender of Democratic causes in Congress, Cummings fostered strong relationships with Republicans across Capitol Hill.

House GOP leader Kevin McCarthy of California spoke in honor of the late congressman last week on the House floor, saying, "Chairman Cummings had an enormous presence."

"Every time we spoke of selecting an individual who can rise to the occasion to be in debate with him, we would look for somebody who was strong, and every time someone was selected, they'd come back to be a very best friend of Elijah Cummings," McCarthy said.

Cummings, who grew up during the civil rights movement, became a leading voice among African American lawmakers on Capitol Hill.

"He spoke truth to power, defended the disenfranchised and represented West Baltimore with strength and dignity," Rep. Hakeem Jeffries of New York, the House Democratic Caucus chairman and a fellow member of the Congressional Black Caucus, tweeted last week. "Congress has lost a Champion. Heaven has gained an Angel of Justice. May he forever #RestInPower."

This story has been updated with additional developments Thursday.