Islamic Answer
Islam, in its general sense as submission to God, comes first. Islam is God religion since start of universe creation. All God prophets are assigned to call people to Islam in the universal sense of Islam that means submission and surrender to God as the one and only one God. Islam per God message to Moses is called Judaism. Islam per God message to Jesus is called Christianity (Catholicism is one of its denominations). Islam per God message to Muhammad is called the very name Islam.
Refer to related question below.
Historical Answer
Christianity existed before Islam historically. The Church first came into existence in the mid 1st Century while compiling the New Testament. Islam as a religion following Mohammed's teachings and the Qur'an did not begin until the early 7th century.
No, it was Christianity.
Islam was formed last
Christianity has the highest population in the world, with over 2.3 billion followers.
Islam, Judaism and Christianity.
Christianity, Islam
Islam, Christianity
The third religion in Israel is Christianity. It comes after Judaism and Islam religions.
The Bible is to Christianity as the Qur'an (Koran) is to Islam.
Judaism, Christianity, and Islam have all claimed the Holy Land for themselves.
Christianity, but Islam may overtake Christianity relatively soon.
Christianity is to Bible as Islam to Quran.
Islam means submitting ones will to God, and Christianity pertains to following the teachings of Jesus. As a Muslim or a Christan you should be doing both. In terms of history Jesus was born first and his religion was started first.