Former Greek Orthodox church and mosque located in Istanbul,
Turkey. The horizon line in perspective drawing is a horizontal
line across the picture. It is often used to separate the sky
from the land. A straight line parallel to the horizon. Hudson
River School A group of 19th century American artists who
initially painted uncultivated regions of the Hudson River
valley, and eventually expanded to landscapes across the
country, focusing on the unique geography and historical
situation of the region. Refers to the name of a color (e.g.,
red, blue, yellow, orange).