Door header design European style effect diagram collection

Quick answer：

Door header design refers to the artistic creation and arrangement of the top of a building's facade. European style effect diagrams typically showcase classical architectural elements and details that are characteristic of European architecture, such as columns, pediments, and decorative moldings. These diagrams are used for architectural design, renovation, and presentation purposes. To find a collection of such diagrams, one could search online for 'European style door header design effect diagrams collection' or visit architectural design websites and forums.