The San Agustin de Laredo Historic District is a historical district that covers what was once the original city of Laredo, Texas that was established by Don Tomás Sánchez. Today, the district is located in Downtown Laredo. The San Agustin District is home to San Agustin Cathedral (which the district's named after) and to the Republic of the Rio Grande Capitol. Most of the district's streets are made from bricks. Most of the buildings in the district reflect Spanish and Mexican influences and are made from masonry. The district is considered the last example of Spanish Colonization of the Lower Rio Grande Valley. The San Agustin de Laredo Historic District is registered in the National Register of Historic Places since 1973. Its historic significance is Architecture and Engineering. Its architectural style is Mission, Spanish Revival, and Greek Revival.

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  Typical Hacienda in the late 1700s in Laredo, now La Posada Hotel
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  Typical home in the late 1700s, later the Republic of the Rio Grande Capitol building, now a museum
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  The Laredo National Bank Headquarters is located on the eastern boundary of the historical district

• National Register of Historic Places listings in Webb County, Texas

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