When creating vestments for the House of the Lord, one should always begin with the advice of a pastor. A good place to start is with meaningful symbols that can be used to teach the faith. Things like the Cross, Holy Communion, the Creeds, Prayer, Baptism, Confession, Key to the Kingdom, Holy Monograms, and so forth are appropriate symbols to start with.  The symbols can be simple, and in many places that creates a comfort zone. The symbols can also be a bit more elaborate. That sometimes gets beyond the comfort zone of some and into unfamiliar territory for others.