<span>1. The Roman Catholic liturgy was traditionally in Latin. The Orthodox Churches use other languages, including Greek, Russian and Syriac. </span>
<span>2. The Orthodox Churches allow married priests. The Roman Catholic Church (with very rare exceptions) does not. </span>
<span>3. The Orthodox and Catholic Churches use different ways to calculate the date of Easter, so that in most years they end up celebrating the feast on different days. </span>
<span>4. The Catholic Church recognises the Pope as having supreme spritual authority on earth. The Orthodox churches dispute this. </span>
<span>5. The Catholic Church recognises a number ecumenical councils which the Orthodox Churches do not (eg Trent, Vatican I, Vatican II). </span>
<span>6. The Catholic Church accepts the 'filioque' clause (Google it) in the Nicene Creed. The Orthodox churches consider it to be an unjustified addition. </span>
