Christians
Halloween can be traced back to the Celts and their ancient festival of Samhain.
Halloween is traced back to Ireland. That's where it is supposed to have begun. In ancient Ireland, Samhain was a pagan festival and Halloween is supposed to have originated from this festival.
Halloween culture can be tracked back to Mexican culture. The Mexicans made Halloween what it is today by celebrating the day of the dead on October 31st.
In the calendar, Valentine's Day (in February) comes before Halloween (in October). Historically, many of our modern Halloween traditions can be traced back to pre-Christian Celtic practices, which date back to centuries BC. St. Valentine was not martyred and made a saint until 270 AD. Halloween was celebrated first.
If you are asking what culture first developed trigonometry, the study of triangles can be traced back to the Egyptians and Babylonians as early as the 2nd millennium BC.
Irish culture has been developing and changing for centuries, so it is hard to say when it started. Some elements can even be traced back thousands of years.
The practice of shiatsu can be traced back to China.
Although Tibetan culture is more recent, Tibetan medical practices can be traced back over 2,500 years.
He can be traced back to English ancestry in the 1600s.
Geothermal energy and nuclear energy cannot be traced back to the sun.
The early Greeks and Romans are known for their culture which is the root of our western culture. Almost all aspects of our society -- legal, moral, logic -- can be traced back to the Greco/Roman societies.
The police traced the ransom call and we were able to get our son back safely. The child traced a picture of Mickey Mouse and joked that she drew it herself. Grandma traced her family's roots back to Ireland.