The Holy Virgin Mary with Joseph
When the Virgin Mary reached fourteen years of age, it was necessary by law for Her to leave the Temple. She either had to go back to Her parents or to marry. Joachim and Anna had already reposed by that time. The priests wanted to give her in marriage, but Mary explained to them Her vow to God — to remain forever virgin. Then, the priests, guided by God, betrothed Her to a distant relative, the 80-year-old Joseph, so that he would have taken care of Her and kept Her virginity.
Joseph lived in the city of Nazareth. He was also descended from the royal family of David. However, he was not a rich man but a carpenter.
The Holy Virgin Mary in the home of Joseph led a humble and solitary life as before in the Temple. In Her free time, She read the books of the Holy Scripture and prayed to God.
Note: Here is presented a short summary of the Birth of the Mother of God and Her childhood as described in Holy Tradition and piously preserved in the Holy Orthodox Church.
(from: The Law of God