Why did Henry the 7th have Thomas more beheaded?

Henry VII did not behead Thomas More; it was actually Henry VIII who executed him in 1535. More, a devout Catholic and former Chancellor, opposed Henry's separation from the Catholic Church and his marriage to Anne Boleyn. More's refusal to acknowledge Henry as the Supreme Head of the Church of England led to his arrest and eventual execution for treason. His steadfastness to his beliefs made him a martyr for the Catholic faith.