And Jesus sat over against the treasury, and beheld how the people cast money into the treasury: and many that were rich cast in much.
Note 1 at Mr 12:41: The treasury that is spoken of here was a place located in the Women's Court, which was in the temple complex but was not part of the temple itself. Women were not allowed in the temple, so the fact that this widow was casting her offering into the treasury would verify the location of the treasury.
In the treasury area, there were thirteen receptacles for offerings called trumpets because of their shape. These trumpets were large at the bottom and narrowed to a small opening at the top much like a megaphone. This method of receiving offerings was used during the reigns of the kings in the Old Testament.