This is the 1795th most frequent German word.
maurer
"Maurer" means "bricklayer" or "mason" in English.
Here, 'Maurer' is a common noun referring to an occupation, specifically someone who constructs walls or buildings using bricks and mortar.
Der Maurer baut eine Mauer.
The bricklayer is building a wall.
In this sentence, 'Maurers' is in the possessive case ('genitive') referring again to a person practicing bricklaying, emphasizing their craftsmanship.
Die Kunst dieses Maurers ist in der ganzen Stadt bekannt.
The craftsmanship of this mason is well known throughout the city.
In this use, 'Maurer' is part of a proper noun as the title of a song, demonstrating its appearance outside literal occupational references.