A few days ago one of my Facebook friends posted a nice comparison of the Palenque Tower before and after the restoration. Fierce discussion arose beneath the post about the accuracy of restoration of the upmost level. Although such a dispute cannot be resolved, an obvious disregard for anastylosis is observed, most likely in exchange for the tourism-oriented aesthetics and illusion of completeness. But that’s not what this post is about.

Fig. 1. Palenque Tower (photo Jan Szymanski).
A number of times a uniqueness of the tower was underlined by various comentators, and that seemed to be the only agreement among the opponents. Well then, is the Palenque Tower unique in the Maya land?
The answer, as it often is in archaeology, is both „yes” and „no”. Yes – because there are no two identical buildings in ancient Maya architecture; not even twin pyramids at Tikal or Yaxha are exactly alike. And up until today no other tall, openwork, scaffold-like, multistorey constructions like that have been reported (fig. 1). However, the answer is also „no”, because there are more examples of Maya structures that can be ascribed to the same genre.
According to a definition by Heinle and Leonhardt (1989:9), two great contemporary structural engineers and theorists of architecture, „[…] the height of the tower is several times the length of its diameter”. Palenque tower fulfills this criterion all right, and so do four square free-standing towers in the Chenes region, and one round tower at Puerto Rico, all in Campeche.
Puerto Rico tower, located a few kilometers north of Xpujil, is perhaps the most peculiar of the lot, for it is circular in plan. E. Wyllys Andrews IV (1968) describes it as being set atop a conical substructure some 2 m high and 8,5 m in diameter. The tower itself was supposed to measure roughly 3 m in diameter and rise some 6,5 m high. The 2010 project (Higón Calvet and May Castillo 2011) has since corrected these measurements a bit. And so the substructure is in fact almost square, with rounded corners, and measures some 4,3×4,5 m. Its height reaches 1,8 m. Four stairways protrude in four directions, all being skewed some 20º east of true north. The tower proved to be somewhat more eliptical then round, with its greater diameter measuring 2,9 m. The overall height of the entire structure is now close to 7,5 m (instead of an earlier 8,5), but the summit is ruined and thus open for interpretations (as is the Palenque example). However, it has to be underlined that the 1995 restoration performed by Antonio Benavides Castillo might have altered the Andrews’s dimensions to a certain degree (fig. 2).

Fig. 2. Horizontal section (north) and ground plan of the Puerto Rico Tower (Higón Calvet and May Castillo 2011:135).

Fig. 3. Composite photo of the Puerto Rico Tower after consolidation (Higón Calvet and May Castillo 2011:132).
A surprising feature of the Puerto Rico tower are the so-called „ducts”, or small horizontal shafts found within the otherwise solid body of the structure. Two pairs of parallel ducts pierce the tower on two different levels (4,73 and 7,29 m from the plaza floor), where the bottom pair is roughly parallel to the eastern and western wall of the substructure, and the upper one is perpendicular to the former (or parallel with the southern and northern walls). Eight „semi-ducts”, or half-shafts connect with the ducts at various angles (see fig. 2, right). Their function is being debated (see below).
The other four towers were found approximately 160 km to the north-east, in the Chenes region. They are curiously located at three sites distributed along a straight line, rounning north from Tabasqueño, through Chanchen, and finally Nocuchich, and further pointing roughly towards the great Puuc capital of Uxmal (fig. 4).

Fig. 4. Spatial distribution of the Chenes Towers (Tichy 1992:46).
The site of Nocuchich, located 8 km east form Hopelchen, actually features two tower-like structures, at least according to the definition mentioned above. However, the Structure 1 appears to be a stela, admittedly very peculiar one (Andrews 1989:24). It consists of a 6,75 m high masonry “body” made of roughly cut stone, with its northern face once being covered with a giant stucco head of a human being. The head was still visible on the 1889 photo by Maler, and, partially, on the 1970 photo by Pollock, but Andrews (1989:19) reports that by the late 1980s the stucco had collapsed and is partially recognizable in the pile of rubble at the feet of Structure 1. He also assumes that once the entire north face of Structure 1 was covered with a stucco figure, perhaps of a ruler or a deity (idem). For details, see fig. 5. The quality of scans is, unfortunately, very poor.

Fig. 5. Nocuchich Structure 1: section and plan (left), photo by Maler (center), photo by Pollock (right; all figures after Andrews 1989:19).
One possible explanation of the odd shape of Structure 1 is that, in the absence of good quality limestone in the north of the Yucatan penninsula, especially one that can be hewn into long chunks, the local rulers resorted to imitating southern Lowlands stelae in the form of a masonry armature with a stucco decoration. It could have been a conceptual merge of the largest stelae (the closest in size would be the examples from Quirigua and B
onampak) and stucco friezes adorning monumental architecture since the Preclassic times (although Andrews [1989:24] rejects the connection between the Lowland stela cult and Structure 1).
The Structure 2, along with the Structure 1 at Chanchen, and, to some degree, the so-called Emblem Tower at Tabasqueño, form another set, with shared features, such as square or squarish plan, vertical division into sections separated by cornices, protruding stones in the upper sections, and the roofcomb-like, openwork top crests (fig. 6). The latter feature is true for the Nocuchich and Chanchen, but the Tabasqueño tower’s top has been broken off at some 4 m of height (with heights of the Nocuchich and Chanchen examples measuring 9,55 and 7,26 m, respectively), and it can be only vaguely reconstructed as being similar to its siblings to the north. Another difference is that the Emblem Tower is the only one of the Chenes lot that was made of a nicely cut and dressed stone on the outside, resembling an outstanding stonework of the Puerto Rico Tower (cf. figs. 3 and 7).

Fig. 6. Nocuchich Tower in 1887 (Maler 1985).

Fig. 7. Tabasqueño Emblem Tower (Sánchez López and Anaya 2006:843).
What of the function and meaning of these towers? Andrews (1989:24) states, quite logically, that they cannot be treated as a whole. He excludes the Nocuchich Structure 1 (see above), postulating a commemorative, or funerary function of the others (idem). He underlines the similarity of the Chenes Towers with the “false temples” of Rio Bec style. However, the latter are quite clearly imitations of the southern Lowlands temples in the Peten style, with false stairs and blind doorways present. The Chenes towers are solid, without any visible features designed to resemble temples, or any other Maya buildings for that matter. The protruding stones, though, combined with a rough stonework that definitely meant to be plastered, could once have been, accoridng to Andrews, the armatures for elaborate stucco designs (idem).

Fig. 8. Comparison of all Campeche towers (Andrews 1989:22).
The funerary function cannot be verified without further excavations that would include tunneling. They may be markers of underlying crypts, or even elaborate enclosures for other kinds of caches. It is also possible (although not very probable), that they represent tombs of cremated rulers. Cremation, however sporadically present in the Maya Area, was never widespread except for some localised Postclassic examples from the northern Yucatan penninsula, and Chiapas (Blom 1954:125-126; Sharer and Traxler 2006:675; tiesler and Cucina 2007:18).
Last but not least, what to make of the “ducts” piercing the Puerto Rico Tower? Anthony Aveni (2001:361-362) notes that, despite thorough archaeoastronomical measurements and observations, no consistent set of celestial phenomena, nor geographic locations, cannot be securely associated with the shafts. However, the 2011 project not only discovered the second level of shafts, but also associated the long shafts with the important stations of the Sun (sunrise on the Solstices and Zenith-passing), and also posited a significance of some “blind” shafts as sockets for removable gnomons that would cast shadow over certain portions of the substructure (Higón Calvet and May Castillo 2011:135-138). Nevertheless, they admit that not all of the “ducts” can be explained as astronomic devices.

Fig. 9. Puerto Rico Tower during restoration in 1995 (A. Benavides Castillo, after Higón Calvet and May Castillo 2011:133).
Looking at one of the pictures showing the restoration process in 1995 (fig. 9) I had just another flash idea. Maybe the ducts were indeed sockets for removable scaffolds that could be assembled for some ritual performances (dance?), or other activities? We know of such scaffoldings mostly from iconography (to mention the San Bartolo mural, among many others). But then again – why go into all that trouble and line the shafts’ inner walls with thoroughly cut flat slabs? So the question remains.
So is there a genre of Maya towers? Surly enough – yes. But they are far from being homogenous both in shape and function. One can argue that the Caracol of Chichen Itza should be included in the lot – and perhaps it should (although it is too stout to fit the definition; so is Temple I at Tikal). Surely the “false temples” at Becan and Xpuhil would pass the criteria as well. The meaning of towers in general is quite a different matter. It contributes to a spohisticated concept of verticality in ancient Maya culture. But that’s another story.
And the initial question from the Facebook discussion remains unanswered…

Fig. 10. Palenque Tower in 1887 (Maudslay 1889-1902:26).
References cited:
Andrews, G.
1989 Four Unique Free Standing „Towers” in the Chenes Archaeological Region, Cuadernos de Arquitectura Mesoamericana 11:17-24.
Andrews IV, E. W.
1968 Torre cílindrica de las Ruinas de Puerto Rico, Campeche, Boletin INAH 31:7-14.
Aveni, A.
2001 Skywatchers, Texas University Press, Austin.
Blom, F.
1954 Ossuaries, cremation and secondary burials among the Maya of Chiapas, Mexico, Journal de la Société des Américanistes 43:123-136.
Heinle, E., Fritz Leonhardt
1989 Towers. A historical survey, Rizzoli, New York.
Higón Calvet, J., M. May Castillo
2011 La Torre de Puerto Rico, Campeche. Estudio de un caso único en la arquitectura maya, EGA. Expresion gráfica arquitectónica 18:130-139.
Maler, T.
1895 Yukatekische Forschungen, Globus 18:248-282.
Maudslay A.
1889-1902 Biologia Centrali-Americana, vol. IV, plate 26, R.H. Porter and Dulau, London; after Harvard University Library HOLLIS electronic database, http://pds.lib.harvard.edu/pds/view/16771060?printThumbnails=no&action=jp2resize&op=j&imagesize=2400&pvHeight=1200&pvWidth=1200&n=362&rotation=0&bbx1=0&bby1=0&bbx2=130&bby2=83&jp2Res=0.25&pres=.125&jp2x=-1&jp2y=-1&maximum.x=10&maximum.y=9
Sánchez López A., Anaya J.
2006 Dzibilnocac y Tabasqueño: arqueología de la región Chenes, in XIX Simposio de Investigaciones Arqueológicas en Guatemala, Laporte, J., B. Arroyo, H. Mejía (eds), pp.838-855, Museo Nacional de Arqueología y Etnología, Guatemala.
Sharer, R., L. Traxler
2006 The Ancient Maya, 6th edition, Stanford.
Tichy, F.
1992 Las torres en la región de Chenes y el meridiano de Uxmal, Cuadernos de Arquitectura Mesoamericana 19:45-52.
Tiesler, V., A. Cucina
2007 New Perspectives on Human Sacrifice and Ritual Body Treatments in Ancient Maya Society, Springer.