Sydney siege victims to be remembered in separate memorials

Siege victims Katrina Dawson and Tori Johnson will remembered at formal services on Tuesday, a week after they were killed in Sydney's Martin Place.

The well-regarded barrister and Lindt cafe manager were killed in the early hours of December 16 after being taken hostage by gunman Man Haron Monis.

Grieving family and friends of Mr Johnson will pay their final respects to the 34-year-old at a private memorial service at St Stephen's Uniting Church on Tuesday morning.

The church in Sydney's CBD is only a few hundred metres from where he died.

Ms Dawson's memorial service will be held in The Great Hall at her alma mater, the University of Sydney, where she studied Arts/Law.

The family of the 38-year-old mother-of-three, who was buried privately on Monday, have asked attendees to wear a splash of aqua, Ms Dawson's favourite colour, to honour her life.

Organisers have also asked for donations to be made to the Katrina Dawson Foundation instead of flowers.

The charity was set up last week for women's education opportunities.

In the wake of the pair's tragic deaths, thousands of Sydneysiders have visited Martin Place where the public outpouring of grief has manifested in a sea of floral tributes.