On a triangular lot on Milwaukee's north side stands a building with ancient sea fossils embedded in its structure.

The Wisconsin Gas Building may be best known for its flame-shaped lamp, but the story of this Art Deco masterpiece begins over three billion years ago.

Constructed in 1895, Milwaukee’s City Hall remains one of the oldest continuously used city halls. But its story begins almost a half-billion years ago.

In this episode of "What Milwaukee is Made Of," we explore the history of Cream City Brick — starting at its Ice Age origins.

Wauwatosa dolostone is used in buildings across Wisconsin, but where did it come from? A geologist tells its story, from its origin 425 million years ago to its use as a building material today.