Shape of the Art

This puzzle consists of sketches of famous pieces of art, drawn only with a single kind of shape each. The title of the artwork fits in the top blanks (ignoring any leading "The"), and the shape fits in the bottom blanks. In each case, there is exactly one overlapping letter:

Image	Art and Shape	Overlap
	G R E A T W A V E O F F K A N A G A W A A N G L E	G
	M O N A L I S A T R I A N G L E	A
	L A S T S U P P E R E L L I P S E	L
	W A S H I N G T O N C R O S S I N G T H E D E L A W A R E L I N E	L
	B I R T H O F V E N U S H E A R T	E
	G I R L W I T H A P E A R L E A R R I N G C R E S C E N T	R
	S T A R R Y N I G H T P O L Y G O N	Y

The overlapping letters spell the answer GALLERY.