There are traditional Catholic wedding customs that involve unity candles, coins, a belu and cords. Here is the symbolism behind the unity candles.
The Unity Candles – The lighting of the unity candles usually takes place at the beginning of the ceremony. One person from each side of the family lights a candle symbolizing God’s presence at the union. Sometimes the couple will then take those lit candles and light a third candle together, signifying that their families are united through them. The third candle is called a "unity candle" and has its origins in the US.
It’s lovely to have symbolism and traditions a part of any wedding ceremony. The unity candles are traditionally incorporated into any Catholic church service, but can also be incorporated in any chapel or civil wedding!