I want to know the answer to the following question:
When did it get its modern spelling?
All the background I'm provided with is that "In the 13th century, with the written emergence of the Galician language, Galiza became the most usual written form of the name of the country, being replaced during the 15th and 16th centuries by the current form, Galicia, which coincides with the Castilian Spanish name.". Is that enough to answer the question?
Answer: yes