Christian Marjory Emily Carlyle Waller (nee Yandell; 2 August 1894 - 25 May 1954) was an Australian printmaker, illustrator, muralist and stained-glass artist.

[2] Waller was born in Castlemaine, Victoria, to Emily and William Yandell, a plasterer, who died when she was five, when she moved to Langston Street, Bendigo, to live with her sister Florence and husband Alexander James Sclater.

Christian moved to Melbourne in 1909 at age fifteen, where she studied at the National Gallery School under Frederick McCubbin and Bernard Hall and exhibited in the Singer Depot windows in The Block, Collins Street, in 1910.[7].

"Yandell’s drawings are an eclectic mix, ranging from depictions of the iconic Mad Hatter’s Tea Party through to densely drawn processional scenes and simple sketches of Wonderland’s inhabitants.

Her linocuts exhibited Art Deco tendencies stylistically, while having a range of symbolic references drawn from classical and Arthurian mythology, Egyptian and Hermetic lore and astrology and numerology.

[1] They were produced by her own Golden Arrow Press,[10] and Hendrik Kohlenberg suggests that Waller undertook most of the physical production of the book in her Fairy Hills studio.

[12] She wrote a second book The Gates of Dawn, illustrated with lithographs, but put it aside to help Napier with his Newspaper House mosaic commission,[1] and unfortunately never published it.

In 1942 she painted a large mural of the Nativity for Christ Church, Geelong and in 1937 one of The Robe of Glory for Fawkner Crematorium; by the end of her life she had completed more than a hundred stained-glass windows.

She and Napier had begun to work for William Montgomery, a leading trade glass firm, while still students, and Christian began creating her own commissions from 1927.

In 1929 she and Napier travelled to Europe where they spent valuable time at the Arts and Crafts studio of British stained glass artist Veronica Whall in London and at An Túr Gloine in Ireland with which a number of women stained glass artists, Evie Hone, Beatrice Elvery, Wilhelmina Geddes, Catherine O'Brien, and Kathleen Quigly, were affiliated with founder Sarah Purse.

The Wallers' Arts and Crafts style house was constructed in Crown Rd, in the Ivanhoe precinct known as Fairy Hills, by builder Phillip Millsom in 1922, through a War Services loan, to the artists' design and specifications.

Lit by windows high up on a mezzanine 'minstrel gallery' was a hall in which they entertained their friends including their neighbour Norman McGeorge and the musicians Bernard Heinz and Fritz Hart, for whom Christian made posters and concert decorations, and Percy Meldrum, architect of Newspaper House which Napier decorated with a mosaic, with furniture designed by the Wallers and painted by Christian in the Arts and Crafts manner and made for them by the Goldman Manufacturing Co.

The Wallers were childless but Christian gathered around her a group of young people who she referred as her 'children' and whom she mentored; Ron Meadows, Harry Tatlock Miller and Hilda Elliott, who became lifelong friends.

In the 1930s Napier Waller began an affair with one of his students at the Working Men's College where he taught, New Zealander Lorna Reyburn, which Christian discovered in about 1937.