This paper discusses the problems and solutions in conserving two significant costumes featured in a new permanent gallery dedicated to the decorative arts at the Powerhouse Museum, Sydney. INSPIRED deign across time exhibition draws upon the museum’s collection of Australian and International decorative arts and design. Over 800 objects are on display, 40 costumes and many related textiles are showcased in a gallery over 1000-metre square. One prominent costume to be included into the gallery is a ball gown owned by Mary Ann Piper in Sydney during the 1820s. The second costume comes from the Museum’s collection of Victorian mourning dress and accessories. The method of reproducing a new fastening to replace the missing button will be discussed.