The Holy Roman Empire was actually in Germany and was named so by a pope after Charlemagne or Charles the Great conquered most of Europe and became Christan.
The Roman Empire, from around 750 BC, began as a kingdom, then a republic, and finally an empire by around 30 BC, encompassing the entire region around the Mediterranean Sea, including as far west as Portugal and north to the British Isles, west surrounding the Black Sea to Armenia and Mesopotamia, to the south encompassed the northern coast of Africa and all of Egypt. Once Roman military conquest had been accomplished, Roman occupation establish the Latin language, legal system, and culture to these lands and was the origin of what is today referred to as "Western Culture".
The Holy Roman Empire included Germany and the part of Italy ruled by Germany between 800 AD to around 1800. Charlemagne, King of the Franks (which was the territory formerly known as Gaul, approximately France and Germany of today) traveled to Rome, where Pope Leo III on Christmas Day in 800, unexpectedly crowned him Emperor of the Romans. This put Charlemagne in direct competition with the Byzantine emperor in Constantinople. Charlemagne's empire included the Germanic empire and that part of Italy controlled by the Germans. From this point on, there is a constant power struggle between the Pope in Rome and the German empire which eventually leads to the decline in the power of the Catholic Church and the rise of Protestantism.
The Roman Catholic Church is normally known for using fresco's and Statues in their churches. Whereas The Eastern Orthodox Church uses mosaics and icons, with a small percentage of the time they will also use fresco's .
The Literal Presence Of Christ in the Blessed Sacrament.
Your question is too general. There are many things that were not a cause of tension between these belief systems. The colour of my dog for instance
Yes, the issue of priestly celibacy is a point of contention between the Eastern Orthodox and Roman Catholic Churches. In the Eastern Orthodox Church, married men can become priests, while the Roman Catholic Church requires celibacy for priests. This difference has been a historical source of tension between the two churches.
the Eastern Orthodox Church and the Roman Catholic Church
The Eastern Orthodox Church split from the Roman Catholic Church in 1054 due to disagreements over the authority of the Pope, theological differences, and cultural and political divisions between the East and West.
Catholic Confirmation usually takes place when the young person is between the ages of 12 - 15 years. Orthodox Chrismation usually takes place after the baby is Baptized.
The Great Schism was between the Roman Catholic Church and the Eastern Orthodox Church (or Catholicism and Eastern Orthodox).
The Eastern Orthodox Church split from the Roman Catholic Church in 1054, in an event known as the Great Schism.
When you speak of "a church" you are usually, but not always, speaking about a particular building used for religion functions. When you are peaking of "the church" you are usually, but not always, speaking of an organized religion like the Roman Catholic Church, The Coptic Church, or the Russian Orthodox church.
It is when The Roman Catholic Church and The Eastern Orthodox Church had The Great Schism, in which The Roman Catholic Church broke off The Orthodox Church.
Roman Catholic AnswerThe Catholic Church is sometimes known as the Western Church to distinguish it from the Eastern Orthodox Church.