Haas and True will perform many of their spiritual compositions along with some new songs following the retreat and workshop. Concert tickets are $20 a person if purchased online or after mass at Sacred Heart Church in Lakewood. The cost increases to $25 a person at the door the day of the concert.

After the concert, the pair will bave CDs, sheet music and books on sale.

For more information, call Maria Perron at 490-4187.