Tomorrow’s Tech Treepowered by Astra

Construction & Cities · Recorded milestone

Concrete skyscraper

Recorded year1903

Cincinnati's Ingalls Building proves reinforced concrete can rise 16 storeys.

Explore this milestone on the interactive map

Built on

No connections of this kind are recorded.

Led to

Sources & evidence

Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.