The four marks of the catholic church
They are that it is”

One
Holy
Catholic
Apostolic

The Marks of the Church as explained in Wikipaedia)

One
The unity of Christ’s Church refers to the need for the Church to be undivided. There are to be no divisions among the members of the Church. For the Church to be one with Christ it must first maintain unity with itself. This aspect stems from Christ’s remarks to the same point: ”I have other sheep that do not belong to this fold. These also I must lead, and they will hear my voice, and there will be one flock, one shepherd.” (John 10:16)

The Body of Christ’s followers is in unity.  Where there are denominations they cause disunity.  The Catholic Church realizes this and declares there must be no disunity in spite of denominations.  This is a sentiment perhaps both protestant and non Catholic denominations should adopt.

Holy
The word “holy” connotes the idea that it is set apart for a special purpose by and for God. In the case of the Church, its purpose is to be the worldly vehicle through which spiritual grace is delivered – the forgiveness of sins and eternal life. (Matt 16:19)

The Bible says we are a chosen race to show forth the praises of God and this is done by demonstrating The Kingdom of God to all those around us.  Denominations by definition must promote themselves and not The Kingdom of God.
Note that God does not see His redeemed as having sin so this role of forgiving sins is not possible as God sees none to forgive.

Catholic
The universality of Christ’s Church establishes the Church as being open to all: all classes, both sexes, all nationalities. The Church maintains that Christ refuses no one from Grace; therefore, the Church cannot refuse anyone as long as they accept Christ’s teachings and Church. “Then Jesus approached and said to them, “All power in heaven and on earth has been given to me. Go, therefore, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the holy Spirit, teaching them to observe all that I have commanded you.” (Matthew 28:18-20)
The catholicity of the Church also refers to the fact that the Church is the same everywhere, in every time. In every land, with every people, the Church maintains the same rituals and beliefs.

There is only one body but where denominations and churches (and similar or associated organisations) pursue their own preservation, self-perpetuation or agendas then there cannot be unity as they are not part of the body as they are not pursuing The Kingdom of God but their own man made ‘kingdom’.

Apostolic
The Church is apostolic, handed down from Christ through the Apostlesto the bishops, to mankind. The Church must have come directly from Christ and can be traced back through history to show that those who lead the Church were commissioned to do so by the Apostles, who were in turn commissioned by Christ. “So then you are no longer strangers and sojourners, but you are fellow citizens with the holy ones and members of the household of God, built upon the foundation of the apostles and prophets, with Christ Jesus himself as the capstone.” (Ephesians 2:19-20)

The only problem with the above list is the ‘Apostolic succession ‘, This means all leaders of the Church are in direct succession to the apostles, This is incorrect except in the case of the Catholic Church. Taken to its fullest expression it would mean outside the Catholic church there no authorised leaders as they do not have Continuous unbroken history back to the Apostles, This fourth mark can only really be a practice of the Catholic denomination’.
What does Jesus say are the marks of The Body?
Remember, Jesus does not recognises denominations such as: Catholic, Protestant, Charismatic and Pentecostal have, or independent churches.
He states in the Letters to the churches in the Book of Revelation that they are to persevere in doing His Will even if it costs them their life.  Absolute obedience to Jesus, regardless of the cost, is the first mark of The Body.
He then said before He went to heaven that His followers would demonstrate the Kingdom of God in their lives.

Mark 16:17-18 And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;, They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.

Another sign would be that they would love all as He loves them
Any church or Christian not trying to do all of these is not following Jesus as they should.
So the signs of The Body (Gods Church) are love, obedience and the demonstration of the Kingdom of God!
The Four Pillars of the Catholic Church
These are:

The Nicene Creed
The Sacraments
The Ten Commandments
The Lord’s Prayer

A pillar is a support and not a foundation. The Bible is the foundation and anything not based on the Bible is on a shaky foundation as it will be based on the reasonings of man and not the truths of God.
The Nicene Creed
There is no problem with this as it is doctrinally sound and is used as a way of learning doctrine.
The Ten Commandments
The Law no longer applies in The New Testament (See Acts 15) so to use these commandments as a basis for classifying things as being sinful, is incorrect.  Besides, if you fulfil the Law of Love you will not do these things anyway.  Perhaps this pillar should be renamed ‘Love’.
In the New Testament, not showing God’s type of Love is the sin as He only gave one commandment, to love others with the same quality of love with which He Loves us.
The Lord’s Prayer
This was how to people were to pray under the Law and was given when Jesus was explaining The Kingdom of God. He said soon afterwards that things were different in The Kingdom of God as God would provide our needs if we seek Him and His Kingdom (Matt 6:33).
He then died at Calvary to remit sin so God no longer sees us as having sin, This means we do not need to confess sin as God does not see us as having sin as these are all now on Jesus.  All we need to do is admit we have weaknesses that causes us to fall short of God’s requirements so we can obtain deliverance or any other type of help we need in regard to those weaknesses (James 5:16)
We must still forgive others or God cannot forgive us and we lose our salvation.
All that is left is a prayer a prayer of worship to The Father and a prayer of desire for the Kingdom of God to come.  This desire for The kingdom of God to come is no longer applicable as Jesus said the Kingdom is within us, unless this desire is for the establishment of His Physical Kingdom on earth.
The Sacraments
A sacrament is basically something holy.  Jesus instituted a remembrance of Him but no ‘sacraments.  These are not established in the Bible specifically as sacraments and indeed some are not found in the Bible.  Accordingly each sacrament must be individually examined using the three parts of the second Test.
These are primarily practices of the Catholic denomination but some are practiced by Protestant and other churches.
As sacraments are not authorised by The Bible they cannot be made a requirement for salvation but only for denominational purposes.
As they are not in The bible, they cannot be a foundation for doctrine but only for practices of The catholic denomination or other denominations that use them.