LTNacionalinio Mikalojaus Konstantino Čiurlionio dailės muziejaus (toliau NČDM) Liaudies meno skyriaus (toliau LMS) archyvo rinkinyje yra sukaupta 21 204 vnt. stiklo ir celiulioido negatyvų, datuojamų 1901-1940 metais. Juose įamžinta Lietuvos sakralinė, etninė ir smulkioji architektūra, gyventojų buitis, darbai ir šventadieniai. Vaizdus užfiksavo kraštotyrininkas Balys Buračas, dailininkas Antanas Tamošaitis, Kauno meno mokyklos dėstytojai, moksleiviai ir kiti, dalyvavę grupinėse ir individualiose etnografinėse ekspedicijose ar kitais tikslais keliavę po Lietuvą. Tarp jų yra ir 326 vnt. dailininko Adomo Varno negatyvų, kuriuose 1921-1929 m. įamžinta Lietuvos sakralinė, etninė ir smulkioji architektūra, žydų paveldas, kapinės. Yra ir XX a. 3 dešimtmetyje sudarytas vardinis A. Varno Lietuvos kryžių rinkinys, kuriame užfiksuoti kryžiai, koplytstulpiai, stogastulpiai ir koplytėlės. Dailininkas į jį įtraukė ne tik savo, bet ir kitų asmenų nufotografuotų kryždirbystės paminklų negatyvus. Šis tekstas skirtas A. Varno kryžių negatyvų rinkiniui ir iš jų atspaustoms nuotraukoms pristatyti [p. 20].
ENPart of Adomas Varnas's negative collection bearing the images of cross-crafting monuments is stored in the Folk Art Division of the M. K. Čiurlionis National Museum of Art. The negatives were acquired in parts in 1981 and 1982. A total of 1,781 units of glass and celluloid negatives were purchased; however, only 1,508 of those negatives were included in Adomas Varnas's collection. The others were either duplicates or auxiliary material. Some negatives were put into six wooden boxes with lids designed specifically for their storage. The negatives were placed into brownish envelopes of coated paper with Varnas's list numbers indicated on them; subsequently, the museum inventory numbers were added. The condition of the negatives both upon their receipt and today was and still is satisfactory because there are deposits, chipped corners; a handful of negatives are broken in half; glass plate surfaces are scratched in places, the emulsion is blistered and cracked in some areas; the edges of celluloid plate negatives are curled up, and that is why they were all taken out of the envelopes and placed into new sleeves, where their condition has stabilised. Throughout the storage period in the museum, the condition of the negatives has not changed. The glass and celluloid negatives were stored together - just as Varnas had put them, in the same original boxes. In 2019, the glass negatives were put into special envelopes and moved to acid- free cardboard boxes, 10 units per box. The celluloid plate negatives were placed into special sleeves - four per sleeve - which were then moved to acid-free cardboard boxes. All Varnas's negatives have been digitalised.