There are several recognized elements in art. The elements are as follows: space, color, texture, shape, form, direction, size, value, and line. Some would say the most recognized element is color.
Contour lines
Lumbricus
They are known best for their lawn mowers. Especially their riding lawn mowers. They are widely viewed as the best brand of lawn mowers in the world. Before lawn mowers they were known for farm tractors. The "Johnny Popper" was one of their most recognized tractors just by the sound of the engine.
The live south of the Sahara, most widely distributed in East Africa
Leonardo da Vinci is one of the most widely recognized designers of ornithopters, mechanical flying machines that mimic bird flight by flapping their wings. His sketches and designs from the 15th century laid the foundation for modern ornithopter designs.
I am guessing that Guinness Stout is Ireland's most widely recognized export.
The revolt of Spartacus is probably the most widely recognised, Spartacus
apple
highschool
The fast-food chain McDonalds is now more widely recognized than even Coca-Cola...
TiVo makes the DVR with the most widely recognized user-friendly interface.
Historically it is probably Eusebio. Currently Cristiano Ronaldo is most widely recognized from the Portuguese team.
The most widely recognized symbol for Islam is the "crescent moon" which is really a coincidence of history. The crescent moon was the symbol of the Ottoman Empire and was historically grafted onto Islam simply by dint of the Ottomans being the most powerful Islamic Empire in modern times.
The Welsh language is most widely spoken in Wales, particularly in the north and west regions of the country. It is recognized as one of the official languages of Wales alongside English.
The square and compasses, sometimes with the letter G in the centre, are the most widely known and recognized symbols of Freemasonry.
If you mean one of his most famous works, "The Raven" is probably the most widely recognized.