404 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1948 
TABLE 5.—Important Quetzalcoatl dates 
THE MAYA ERAS: 
Gregorian calendar Maya calendar Name of era 
1 Oct 1553373 rR. Baktun 13, 4 Ahau 8 Cumhu Era of the World 
1 Aug. 267615 Bac: Baktun 7, 10 Ahau 18 Zac Era of History 
111 Feb. 11, 176 A. D. Baktun 9, 8 Ahau 13 Ceh Era of Sacred Fire 
YWUMMA 
Ficure 5.—Nacxitl Quetzalcoatl’s temple. Ground plan and elevation of the building 
enshrined in the pyramid and memorial structures of the magician, Uxmal, Yucatan. 
Only the western facade was known as entrance to the sanctuary of the annex till walls 
were breached in 1947. The top of the roof comb is discernible on the floor of the 
topmost structure. 
DATES OF THE SNAIL (Morley readings, Spinden reductions): 
A 10- 0- 0- 0- 0, 7 Ahau, 18 Zip, May 16, A. D. 570. 
4000 tun after Era 1 Inferior Conjunction, Venus and Sun. 
B 10- 0-15- 0- 0, 12 Ahau, 8 Cumhu, Feb. 26, A. D. 585. 
3960 calendar years after Era 1. 
C 10— 0-16- 0- 0, 8 Ahau, 3 Cumhu, Feb. 21, A. D. 586. 
586 tzolkin after Era 111. 
D 10— 0-17— 0- 0, 4 Ahau, 18 Kayab, Feb. 16, A. D. 587. 
(a) 4 Ahau of Maya zero. 
(b) Venus date, Calendar A, 7 calendar rounds later, is the latest date on the Dresden 
Codex. 
(c) 609 tropical years before establishment of Toltec New Fire Ceremony. 
E 11-16- 0- 4-1, 3 Imix, 9 Yax, April 4, A. D. 1280: seventy-second anniversary of the 
death of Quetzalcoatl, evening of April 4, 1208. 
CHICHEN Itza, CAPSTONE THOMPSON’s TEMPLE: 
4 Ik 0 Pop, Oct. 14, A. D. 1209. New Year Day. 
5 Chicchan 1 Pop, Oct. 15, A. D. 1209. 
11-12-7815 84) on ican 2 Pop, Oct. 16, A. D. 1209. Year-bearer. 
UxMaAL, Batt Court RInGs: 
Sai caine. 16 Pop, Oct. 14, A. D. 1276. 
M=15-16-12-11, 10 Ix{17 Pop, Oct. 15, A. D. 1276. 
This inscription documents calendar change to Mexican style. 
