Conversation so far:
who mapped the coastline of texas in 1519
Sailing from a base in Jamaica, Alonso Alvarez de Pineda, a Spanish adventurer, was the first known European to explore and map the Texas coastline.
who colonized texas
Anglo-American colonization in Mexican Texas took place between 1821 and 1835. Spain opened Texas to Anglo-Americans in 1820, less than one year before Mexico achieved its independence.

Question: when did it become a state
Self-contained rewrite: when did texas become a state