amacalli.

Jnjc nechichioale omexaoale, amacale, olchachapanquj, tlaolchipinilli yn jamacal, yoan quetzalmjiaoaio, aiuchicaoace. = Thus was she arrayed: two spots were painted on her face; she had a paper crown; large drops of liquid rubber and small drops were spattered over her paper crown, and it had quetzal feathers arranged to resemble corn-tassels. She carried the mist-rattleboard. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 1 -- The Gods; No. 14, Part 2, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1950), 5.

amacalli = paper crown (combining amatl + calli)
Justyna Olko, Turquoise Diadems and Staffs of Office: Elite Costume and Insignia of Power in Aztec and Early Colonial Mexico (Warsaw: Polish Society for Latin American Studies and Centre for Studies on the Classical Tradition, University of Warsaw, 2005), 155.

Y yamacal quetzalmiavayo = her paper crown has a quetzal feather crest
Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan, et al. (Norman: University of Oklahoma Press, 1997), 104.

"caja de papel" = "pieza de papel que se usaba simplemente como tocado o como estructura de un tocado de plumas" -- "En D 6 dice que el anecúyotl era un amacalli con plumas."
Alfredo López Austin y Leonardo López Luján, Monte Sagrado--Templo Mayor (México: Instituto Nacional de Antropología e Historia y Instituto de Investigaciones Antropológicas de la Universidad National Autónoma de México, 2009), 498.