
Between each numbered north-south street it's possible to have up to three interstitial streets, many of which are no more than alleys. The same holds for the named east-west streets. Rarely do all three streets turn up, though, and usually only one or two appear, running for only a block or two. Thus, these streets go on for miles, even though they are broken up and one piece can appear, say, in South Philly and only again in Olney or Fern Rock.
One of these slight lanes is American Street, which is a thin, bricked alley in some neighborhoods, and covered by a freight line in others.
The situation came about in 1854 when several townships and locales were absorbed by Philly proper. To avoid duplication of street names, it was decided to adopt a single name for streets that were in the same spot N-S and E-W.
Prior to the late 1800s, American Street was known, in different spots, as Corn, Strongford, Guilford, Aberdeen, Levant, St. John, and Washington Streets, as well as Ashland between Delancey and Spruce, as shown by the chiseled sign shown here at Delancey and American.
The lightpost nearby, though, display's the street's present name.

Here, American Street is typical of so many lanes in Old City, Society Hill, and Queen Village: narrow, Belgian-blocked, and lined with cozy townhouses, many of which still have wood-burning fireplaces.
But glancing down the street I spotted a noticeable difference...many of the homes were displaying unusual flags.
This flag is the official banner of the Philadelphia Light Horse Troop, Philadelphia City Cavalry, a division of the PA. National Guard. It was one of the first patriotic military divisions established (1774) during the American Revolution; the troop fought battles at Trenton, Princeton, Brandywine, and Germantown and served as General Washington's personal bodyguard; during the Civil War, it fought at Bull Run and Gettysburg. It last deployed overseas in Bosnian conflict in 2003.
The British Union Jack was originally painted in the canton (the corner field) but the artist was instructed to paint thirteen stripes to represent the united colonies; this was the first flag to thus represent the colonies.

This red and gold banner, with lion rampant (standing on the left leg with paws raised) is the Royal Banner of Scotland (not to be confused with the Flag of Scotland featuring St. Andrew's Cross) and was the national flag of Scotland before its absorption into the United Kingdom in 1707. It is still raised at Scottish royal residences when the British monarch is not present. Many Scots still proudly display it.
The flag is described in heraldic terms as: "Or, a lion rampant Gules armed and langued Azure within a double tressure flory counter-flory Gules." (a yellow field with a lion rampant with blue tongue and claws within a double-ruled box ornamented with fleurs-de-lis.) The lion is sometimes shown, as here, without the blue in the tongue and claws.