Frederick's first name has been spelled as Fredric, Fredrick, and Frederick in various records. For purposes of his memorial, name is spelled as Frederick which matches his tombstone and IL death record.
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IMMIGRATION RECORD OF FREDERIC CHELIUS (Ancestry)
Name: Mr. Frederic Chelius
Arrival Date: 06 Nov 1865
Birth Date: abt. 1839; age 26; Male
Ethnicity/Nationality: Germany
Place of Origin: Germany
Port of Departure: Brest and LaHavre, France
Destination: Chicago
Port of Arrival: New York, New York
Ship Name: Europe
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According to the 1870 (Chicago, Illinois) census Frederick was born in Bavaria(Germany).
The 1900 census as well as his Illinois death certificates states birth place as Germany.
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Illinois Death Record (On-line Ancestry)
Name: Frederick N Chelius
Birth Date: Abt 1846
Birth Place: Germany
Death Date: 9 Nov 1910
Death Place: Chicago, Cook County, Illinois
Burial Date: 12 Nov 1910
Cemetery Name: St. Mary
Date Age: 64
Occupation: Building Contractor
White/Married/Male
Street address: 3102 E. 83rd St. 8th Ward
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The Times (Munster, Indiana), Friday, November 11, 1910

SOUTH CHICAGO.

Fred N. Chelins[sic], for the past thirty years a contractor in South Chicago and builder of the old Bowen high school, died at his home, 3102 E. Eighty-third street, at 930 last [sic] evening. Mr. Chelins played a most important part in the building of the World's fair in the building of the World's fair in Chicago. For the past three months he has been ill with pneumonia and complication of diseases. He is survived by his wife and six children, John, Joseph, William, Edward, Mrs. Ella Johnson, and Mrs. J. Fred Sheehey.