However, early Netherlandish painting in the 15th century was the first to make oil the usual painting medium, and explore the use of layers and glazes, followed by the rest of Northern Europe, and only then Italy.
An American flag or for that matter any flag flown upside-down is considered a sign of distress... US Code:T36 Ch10.176. (a) The flag should never be displayed with the union down, except as a signal of dire distress in instances of extreme danger to life or property.
The American flag is a symbol of freedom, liberty and human rights. It is a symbol of our home and all that we believe in. A symbol men rally behind, whether on our shores or foreign shores. Some hold the flag as something sacred, others have a moderate reverence for it.