Did they put candles on christmas trees?

From a Christian perspective, the answer is no. Christmas trees are a pagan symbol and pagan practices, such as using candles on them, are discouraged. Christmas trees are a relatively recent addition to the holiday, first appearing in Germany in the 16th century. But it wasn't until the 19th century that they began to gain popularity in the United States. The custom of using candles on Christmas trees is thought to have started in 1882, when a German immigrant named August Imgard decorated his tree with candles. The idea quickly caught on, and by the early 20th century, candles were a common sight on Christmas trees. However, not everyone was a fan of the practice. In 1909, the National Fire Protection Association (NFPA) published a report that warned of the dangers of using candles on Christmas trees. The report noted that there had been several fires caused by candles on trees, and that the practice was "particularly dangerous." The NFPA's warnings were heeded, and by the mid-20th century, the use of candles on Christmas trees had largely declined. Today, it is generally considered to be a safety hazard, and most people opt for electric lights instead.