Lusitanic definitions of "Lusitanic" or "Lusitanian" may include medieval-to-modern Galicia, because the Portuguese people and Galician people share close linguistic and cultural ties, including pre-Roman Celtic ones. Modern Portuguese and the Galician language both derive from medieval Galician-Portuguese, and the term is a cultural classification more than a historic–geographical definition. Although, in Ancient Roman times, the Gallaeci were not part of Lusitania province, what became the Galician-Portuguese language developed from Vulgar Latin in Gallaecia, which comprised what is now Galicia, as well as north Portugal, the center of the development of post-Roman Portuguese culture. Later Portuguese use of the name "Lusitania"
The Sinking of the Lusitania layers, which could be laid over a static background layer, relieving animators of the tedium of retracing static images onto drawing after drawing. McCay adopted the cel method beginning with "The Sinking of the Lusitania". As with all his films, McCay financed "Lusitania" himself. The cels were an added expense, but greatly reduced the amount of drawing necessary in contrast to McCay's earlier methods. The cels used were thicker than those that later became industry standard, and had a "tooth", or rough surface, that could hold pencil, wash, and crayon, as well as ink lines. The amount of rendering caused