There are no “sacred portals,” Catholics.
For Catholics a Door to a Church is considered Holy since it is a gateway from the secular profane world with the reality of sin to a Church where the Sacraments, visible signs of God’s Grace are fully made available by Christ to the faithful (his Body the Church]. So a Church is a Holy place, a Door to a Church by extension is Holy, the altar in the center of the Church is Holy, the Bible read in Church is Holy, the Icons of and paintings of Christ and the Saints are considered Holy.
The are sacred because they are signs of something deeper in that they point to the Triune God and Mysteries of the faith. We are not iconoclasts.