Christianity
It is a monotheistic Abrahamic religion, based on the life and teachings left by Jesus of Nazareth, presented in the biblical canon. That runs from the Old as the New Testament
Sense
It is to be oriented towards God and to be faithful to his commandments and teachings that is the object, to achieve spiritual salvation and readiness.
The sacred and the profane
You will worship God above all things.
You will not take God's name in vain.
You will sanctify the holidays (This commandment commands us to hear mass every Sunday and not work on that day).
Honor your father and mother.
You will not murder.
You will not commit impure acts (The couple must reserve for marriage the expressions of tenderness characteristic of conjugal love).
You will not steal.
You will not give false testimonies or lies.
You will not consent to impure thoughts or desires.
You shall not covet.
Rites
BAPTISM: It is a sacrament, where we are reborn to the divine life and become children of God.
COMMUNION: It is an act where the citizens receive the Eurocaristy, to receive a communion it is necessary to be Catholic and to have received the Baptism, then it is necessary to receive a catechesis, and finally to have done the penance. Some sins like homicide can only receive the forgiveness of the Holy God
CONFIRMATION: This sacrament perfects the baptismal grace by strengthening our faith and making them "soldiers" of Christ.
The God
Christianity was the first religion to conceive God as a kind of guardian that is outside the world, which observes your actions from above and with which he engages direct communication on certain occasions after prayers. In general, God is considered as omnipresent (he is everywhere), omnipotent (he can do everything) and omniscient (he knows everything). According to religion, it receives different names, such as Allah (Islam) or Yahweh (Judaism).
Countries
The amount of Christians in the world is immense, so I preferred to leave them in an image
Holy book
In all monotheistic religions (also called Abrahamic or book religions), the Hebrew Bible are sacred scriptures of Judaism; the Bible (composed by the Old Testament, identical to the Hebrew Bible with the addition of the Deuterocanonical writings and the New Testament) is that of Christianity.