The 15th century was the century which spans the Julian dates from 1 January 1401 to 31 December 1500 . In Europe , the 15th century includes parts of the Late Middle Ages , the Early Renaissance , and the early modern period .
c. 3100 BC – 2600 BC: Skara Brae, Orkney Islands, Scotland is inhabited. c. 3090 BC: Narmer (Menes) unifies Upper and Lower Egypt into one country; he rules this new country from Memphis. c. 3051 BC: The oldest currently living organism, a Great Basin bristlecone pine, undergoes germination in the White Mountains of California.