Altars were built by Noah, Abraham, Isaac, Jacob, Moses and Joshua.
Altars were built for the purpose of (Animal) sacrifice. A bloody sacrifice, pointing to the cross.
Moses was also commanded to build an altar of Incense, where incense was burnt upon it twice daily.
This altar symbolized the offering up of believers prayers.
Exodus 30:7,8 KJV
 And Aaron shall burn thereon sweet incense every morning: when he dresseth the lamps, he shall burn incense upon it.
 And when Aaron lighteth the lamps at even, he shall burn incense upon it, a perpetual incense before the LORD throughout your generations.
The construction of the Old Testament Tabernacle with its altars was a type of the heavenly.
Revelation 8:3 KJV “And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.”
Once a fire had been started at an altar, it was never to go out.
Leviticus 6:13 KJV “The fire shall ever be burning upon the altar; it shall never go out.”
I Thessalonians 5:7 KJV " Pray without ceasing."
Every church should have its altar.
The Altar is the very symbol of the Presence of God, and Sacrifice.
At the Church Altar, it is the place where we may come and meet with the Lord to receive Him into our heart and life.
At the Church Altar, it is the place where we may pledge our lives in service to the Lord.
At the Church Altar, it is the place where we in the presence of the Lord, may repent of sin and ask for His forgiveness.
At the Church Altar, it is the place where we may take the hand of our neighbor who we have offended and before the Lord ask forgiveness.
At the Church Altar, we may be baptized in the power of the Holy Spirit.
At the Church Altar, we may pour our heart out for the salvation of our loved ones.
At the Church Altar, we may pray for our Pastor, Missionaries, and our Countries Leaders.
May our churches once again, emphasize the importance of “The Altar.”
Our homes should have its family Altar.
At our home altar, we may come and meet with the Lord, and tell Him of all our concerns.
(I Peter 5:7 KJV “Casting all your care upon Him; for He careth for you.”)
At our home Altar, we may pray with and read God's word and, instruct our children.
At our home Altar, we may pray for our loved ones.
At our home Altar, we may pray for our Church and its outreach.
At our home Altar, we may pray with our neighbors.
At our home Altar, we may pray for God's help to be a witness.
With our world full of hate and fear, is it any wonder why the enemy of our souls has tried his best to diminish any reference to Altars.
Pray that our Lord will help and guide you to renew the Altar at your church, and your own home.
Exodus 20:24 NLT “(The Lord told Moses)...Build my altar wherever I cause my name to be remembered, and I will come to you and bless you.”