Historical Marker Search

You searched for Postal Code: 18106

Showing results 1 to 1 of 1

historicalmarkerproject/markers/HMJZ5_portland-cement_Allentown-PA.html

This industry was born in the Lehigh Valley. David O. Saylor first made portland cement at Coplay in 1871. Here also was the first use of the rotary kiln process commercially Nov. 8, 1889. This region has continued to lead in the industry.

show these results on map

PAGE 1 OF 1

@TweetsByHMP — Our most recent tweet:

— about 56 years ago

Stay In Touch

About Historical Marker Project

We are building the largest online collection of historical markers, along with other markers that represent significant events, people, places, and more, but we can't do it without your help. Become a member and you'll be able to add historical markers, post comments, save favorites, check in, and more.

Subscribe To Our Newsletter

Keep up with everything we do — We'll deliver our newsletter to your inbox each week.

Historical Marker Project On Facebook

Quick Links

© 2025 Historical Marker Project. All Rights Reserved.
All registered trademarks are the property of their respective owners.
HMP is owned and operated by 3RiverDev (Fort Wayne, Indiana).
Terms and Conditions | Privacy Policy | Disclaimers | About | Contact Us