Thanks to Beth for hosting Postcard Friendship Friday!
I was excited when I found this torn card, because I imagined the torn part said "City Hall, Brooklyn." Which would make this a rare and special card.
Brooklyn lost its status as an independent city when it was consolidated into Greater New York in 1898 and became a borough of the big city. This card has a 1909 postmark, and an undivided back (which was discontinued in 1907). My guess is that the postcard is what every collector (of anything) dreams of finding: old store stock. The first line in the message to Miss A. B. Bell of the Lodge, Basin Harbor is "Thanks for the post-cards." Possibly these two correspondents were collectors, and knew the value of this card.
Then again, I could be way off base; could be the torn part said "City of New York, Brooklyn Borough..." Oh, boo. I like my first guess better.
The building, built 1846-1851, was Brooklyn's city hall, and still exists as Brooklyn's Borough Hall.
I used to work at a news service not far from this building. There's a subway stop nearby that's pretty special, as you can see in these photographs. (Not to be confused with the ordinary Jay St. Boro Hall stop on the IND line.) I'll be in Brooklyn tomorrow, visiting Carol Carey, paper doll collector extraordinaire.