* Queen Elizabeth I (1558-1603): Shakespeare's most prolific period was during Elizabeth's reign. He began writing and performing his plays around the time she ascended to the throne and continued to do so throughout her reign.
* King James I (1603-1625): Shakespeare continued to write and perform plays for a short time after Elizabeth's death and James I's ascension.
So, Shakespeare's plays were written during both the Elizabethan and Jacobean periods.