A T and O map or O-T or T-O map (orbis terrarum, orb or circle of the lands; with the letter T inside an O), is a type of medieval world map, sometimes also called a Beatine map or a Beatus map because one of the earliest known representations of this sort is attributed to Beatus of Liébana, an 8th-century Spanish monk. The map appeared in the prologue to his twelve books of commentaries on the Apocalypse.

The T-O map represents the physical world as first described by the 7th-century scholar Isidore of Seville in his Etymologiae (chapter 14, de terra et partibus):

Latin: Orbis a rotunditate circuli dictus, quia sicut rota est [...] Undique enim Oceanus circumfluens eius in circulo ambit fines. Divisus est autem trifarie: e quibus una pars Asia, altera Europa, tertia Africa nuncupatur.

English: The [inhabited] mass of solid land is called round after the roundness of a circle, because it is like a wheel [...] Because of this, the Ocean flowing around it is contained in a circular limit, and it is divided in three parts, one part being called Asia, the second Europe, and the third Africa.

Jerry Fulton Cantrell Jr. (born March 18, 1966 in Tacoma, Washington) is an American guitarist, singer, and songwriter best known for his work with the grunge/metal band Alice in Chains, as lead guitarist, backing and co-lead vocalist, main songwriter, and co-lyricist. He performs lead vocals on his solo projects, and is part of Alice in Chains' harmonizing dual-vocal style. He resides in Los Angeles and spends time on his family ranch in Oklahoma.

Cantrell recently toured in North America supporting Alice In Chains' first new studio album in 14 years, Black Gives Way to Blue.

Cantrell noted in an interview that he was "raised on country music" as a youth and that he admires the emotion conveyed in the genre. He also considers himself "half Yankee and half redneck." However, hard rock music caught Cantrell's interest predominantly, and he bought his first guitar in his mid teens. It wouldn't be until the age of 17 that he began seriously playing the instrument. Cantrell would later cite groups and musicians like Jimi Hendrix, Heart, Black Sabbath, and Queensrÿche as major influences.