So that he could educate Justinian to be the future emperor after him
In the US it is.
until she is 18 is up to the govement and her unkel to let you adopt her but when she is 18 she as a say if she wants you to adopt her
Isc
justinians
The Justinian Code.
Justinian code of laws
Your father would have to give up all parental rights and your uncle would have to petition the court to adopt you. Unless you father gives up his rights, there really isn't a way to force him.
Because it made him very important.
his wife
In the United States adoption is covered by state law. In all of the states in this area, the answer is yes. I have no idea what it might be in some other place.
to reunite the roman empire
justinians. For E2020 answer it's missi dominici