Which of these is portrayed on a United States ten-dollar bill?

The United States ten-dollar bill ($10) is a denomination of U.S. currency. The obverse of the bill features the portrait of Alexander Hamilton, who served as the first U.S. Secretary of the Treasury. The reverse features the U.S. Treasury Building. All $10 bills issued today are Federal Reserve Notes.

As of December 2013, the average life of a $10 bill is 4.5 years, or about 54 months, before it is replaced due to wear. Ten-dollar bills are delivered by Federal Reserve Banks in yellow straps.

The source of the portrait on the $10 bill is John Trumbull's 1805 painting of Hamilton that belongs to the portrait collection of New York City Hall. The $10 bill is unique in that it is the only denomination in circulation in which the portrait faces to the left. It also features one of two non-presidents on currently issued U.S. bills, the other being Benjamin Franklin on the $100 bill.