Dreams were certainly around during Biblical times. The Bible is full of references to dreams, dreaming and visions. There are almost a hundred such references in the Old Testament alone.
Genesis 28:12 - "And he (Jacob) dreamed, and behold a ladder set up on the earth, and the top of it reached to Heaven: and behold the angels of God ascending and descending on it."
Genesis 37:5- "And Joseph Dreamed a dream, and he told his brethren: and they hated him yet the more."
NEW TESTAMENT - Matthew 1:20 - "But while he (Joseph) thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost."
Nebuchadnezzar, who suffered from insomnia, had troubling dreams when he did manage to fall asleep. Daniel gained political power because of his ability to interpret these dreams and that power led to the freeing of the Jewish people.
And, speaking of Judaism, within the sixty-three volumes of the Talmud (Jewish text of canon and civil law) there are 217 references to dreams.
And Christianity is not the only religion to refer extensively to dreams. Joseph Smith received the Book of Mormon in a vision. The Eastern religions - Buddhism, Hinduism and Islam, all rely heavily on dreams and dream symbolism. Muhammad received his divine messages in dreams.
Dreams are a big part of New Age spirituality where seeing auras, being visited by animal spirits and studying the chakras rely, at least in part, on the person's ability to know And understand his or her dreams.
The Pagan or Wiccan religion is very old. In fact it predates Christianity. In fact, much of the chanting and ritual used in these religions is to produce a trance like state and promote dreams.
Even the West Indian religion of voodoo relies on dreams. Here, again, the shaman (called a houngan) employs chants, the throb of the drum and dancing to induce the dream-like state. .
