Seguin is a city in and the county seat of Guadalupe County, Texas, United States. The estimated municipal population in 2012 was 26,272.
Seguin is one of the oldest towns in Texas, founded just sixteen months after the Texas Revolution. The frontier settlement was a cradle of the Texas Rangers and home to the celebrated Captain Jack Hays, perhaps the most famous Ranger of all.
Seguin was the home of Dr. John E. Park, who experimented in construction using concrete made from local materials. The nearly 100 structures—the courthouse, schools, churches, homes, cisterns, walls, etc.—made up the largest concentration of early 19th-Century concrete buildings in the U.S. About 20 of them remain standing.
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