Early in the Middle Ages, there were some Celtic Christians in the Anglo saxon Kingdoms, but the Anglo Saxons mostly converted from their pagan religion to the Catholic Christianity. These two Churches gradually combined in time. There were some Jews in England during the High Middle Ages. And there were also a fairly large numbers of heretics, mostly Lollards, who were precursors to the Protestant Churches.
Everyone in the middle ages was Catholic and the church taught that man was born in sin and the only way to heaven was to go through them. They were the connection between man and God and that people had to follow their teachings. In this time people couldn't read or write and the church taught The Bible stories with the stain glass windows in the churches, through passion plays, and through the services. They were able to control the science, learning, and thinking of the time because of this and people believed that if they didn't follow the teachings they would go to Hell.
sacraments
Christians do not believe in reincarnation. Christians believe in Heaven.
the spirituality
Christians believe there is only one God.
Christians believe that 'life starts' at conception.
Jerusalem
Christians believe that the Messiah Has Come. Jews believe that He Has not.
Christians continue to believe in thousands of different saints. There are currently over 10,000 named saints that Roman and Orthodox Christians believe in.
As far as i know, all christians believe that.
True Christians do not believe in Astrology. .
Yes, Christians all believe that the soul will live on after the body has died.
Most medieval queens in Europe were Christians. Some were not. Aside from those areas of Europe where there were pagans, there were well organized and sophisticated monarchies in Europe that were Muslim, such as those in Spain and Sicily.