The Abrahamic Family House, a project approved by Pope Francis, puts a Mosque, and Temple, and a Church in one House. These are the three great monotheistic religions of the world. But is there any support in Scripture for such a project? Yes.

[Matthew 17]
{17:1} And after six days, Jesus took Peter and James and his brother John, and he led them onto a lofty mountain separately.
{17:2} And he was transfigured before them. And his face shined brightly like the sun. And his garments were made white like snow.
{17:3} And behold, there appeared to them Moses and Elijah, speaking with him.
{17:4} And Peter responded by saying to Jesus: “Lord, it is good for us to be here. If you are willing, let us make three tabernacles here, one for you, one for Moses, and one for Elijah.”
{17:5} And while he was still speaking, behold, a shining cloud overshadowed them. And behold, there was a voice from the cloud, saying: “This is my beloved Son, with whom I am well pleased. Listen to him.”
{17:6} And the disciples, hearing this, fell prone on their face, and they were very afraid.
{17:7} And Jesus drew near and touched them. And he said to them, “Rise up and do not be afraid.”
{17:8} And lifting up their eyes, they saw no one, except Jesus alone.

Three tabernacles — three tents or places — one for Moses, representing Judaism, one for Elijah, a prophet, representing Islam, and one for Jesus, for Christianity. This is very similar to what Francis has proposed, slated to open in 2022. And the transfiguration of Jesus may represent a transfigurating event in the Church. But notice that when the three Apostles lifted up their eyes, they saw no one but Jesus alone, meaning that the three tabernacles does not change the truth that Jesus alone is the sole source of salvation.

[Zechariah]
{14:16} And all those who will be the remnant of all the Gentiles that came against Jerusalem, will go up, from year to year, to adore the King, the Lord of hosts, and to celebrate the feast of tabernacles.

The above verse predicts a yearly feast, which I suggest may yet be in our future, of a new feast of tabernacles for the three great monotheistic religions. Those three religions worship the one true God, Creator of heaven and earth.

Ronald L Conte Jr