AURORA, Ill. (AP/KDKA) — An Illinois man who spent years making crosses and bringing them to the sites of mass shootings and other disasters around the United States died Monday.

The death of Greg Zanis, announced by his daughter, Susie Zanis, and confirmed by the mayor of the community where Zanis lived, was expected after a recent announcement that he had been diagnosed with bladder cancer and did not have long to live.

READ MORE: Crews Spend Hours Trying To Gain Control Of Massive Scrapyard Fire On Neville Island

Zanis made the 11 Star of David memorials that sat outside of the Tree of Life Synagogue in Squirrel Hill after the shooting there in 2018, the Chicago Tribune reports.

(Photo Credit: KDKA)

On Friday, the 69-year-old Zanis greeted supporters who drove by his Aurora home as part of a drive-by procession and living visitation that was organized by his daughter.

On Aurora’s Facebook page, Mayor Richard Irvin paid tribute to Zanis.

“Greg Zanis was a giant among men. He was a man of action who simply wanted to honor the lives of others.”

Zanis established Crosses for Losses as a tribute to his father-in-law, who was fatally shot in 1996.

READ MORE: Pine-Richland Head Football Coach Eric Kasperowicz And Entire Coaching Staff Will Not Return In Fall

“It really helped me with my grieving process,” he told The Associated Press in 1999.

Since then, he set up crosses throughout the United States, including near the mass shootings at Columbine, Sandy Hook and Parkland and at the site of the Las Vegas music festival shooting and the Orlando nightclub shooting.

In the fall of 2018, he traveled to Pittsburgh to place the Star of David memorials, one for each victim, outside of Tree of Life in Pittsburgh.

He also set up crosses in places where the deaths did not receive nearly as much publicity, such as the spot in New Mexico where six children died in a bus accident and in 2016 he made more than 700 crosses that were carried along Michigan Avenue in Chicago to honor each person who had been killed that year. Just last year, he made crosses for his hometown after a warehouse worker opened fire, killing five of his co-workers before he was killed during a shootout with police.

In December, after making and delivering 27,000 crosses over more than two decades, he announced he was retiring.

“I had a breaking point in El Paso,” he said, referring to the mass shooting outside of a Walmart in El Paso, Texas. “I hadn’t slept for two days, it was 106 degrees and I collapsed from the pressure when I heard there were two more victims of the mass shooting.”

MORE NEWS: Johnson & Johnson Vaccine To Remain In Limbo While Officials Seek More Evidence

(TM and © Copyright 2020 CBS Broadcasting Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)