The cross and benches were a gift from the Paramor family in memory of former Mandurah residents and church supporters Don and Katie Paramor.
Then the items were dedicated last week, the entire Paramor family attended, arriving from as far away as Spain, Sydney and Kununurra to celebrate.
The concept of a sacred space in the church grounds where people could sit quietly was realised when the Dean of Bunbury and former Mandurah parish priest, the Very Reverend Darryl Cotton, dedicated the cross and benches.
Don and Katie, members of the pioneering Paramor family who settled in the South West in the 1840s, shifted from country WA to Mandurah in the early 1970s.
Don died 20 years ago.
Katie, who was heavily involved in the church, the guild and the Red Cross, died last year, aged 97.
Son Greg said the family wanted to leave something behind in memory of her involvement with the church.