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Today in Chicago History: The city’s street grid system — centered at State and Madison — instituted

11 verified updates • corroborated by 2 independent sources • tracked since September 1, 2026

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  Sep 01, 04:31 AM 1 source: Chicago Tribune

  Today in Chicago History: The city’s street grid system — centered at State and Madison — instituted
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  Sep 01, 09:01 AM 1 source: chicagotribune.com
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  Sep 01, 10:01 AM 1 source: Chicago Tribune
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  Sep 01, 01:01 PM 1 source: chicagotribune.com
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  Sep 01, 02:01 PM 1 source: Chicago Tribune
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  Sep 01, 03:01 PM 1 source: chicagotribune.com
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  Sep 01, 04:01 PM 1 source: Chicago Tribune
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  Sep 01, 11:31 PM 1 source: chicagotribune.com
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  Sep 02, 12:01 AM 1 source: Chicago Tribune
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  Sep 02, 01:01 AM 1 source: chicagotribune.com
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  Sep 02, 01:31 AM 1 source: Chicago Tribune