Convicted Boston Marathon bomber Dzhokhar Tsarnaev has been transferred to a high-security "supermax" prison in Colorado, where he will be held until he is moved to federal death row. Tsarnaev, a U.S. citizen of Chechen decent, was sentenced to death for the 2013 attack at the Boston Marathon finish line that killed three people and wounded 264 others, including 17 who lost limbs.

Dzhokhar Anzorovich "Jahar" Tsarnaev, born on July 22, 1993 and his brother Tamerlan Tsarnaev were convicted of planting bombs at the Boston Marathon on April 15, 2013. At the time of the bombings, Tsarnaev was a student at University of Massachusetts Dartmouth.

Tsarnaev received the death sentenced last month. He then was taken from Massachusetts to the U.S. Penitentiary in Florence, Colo. A U.S. Bureau of Prisons spokesman said that Tsarnaev will eventually be moved to a Terre Haute, Ind., to the prison where federal death row inmates are executed, reports USA Today.

Supermax is home to criminals such as Ramzi Yousef, who plotted the 1993 bombing at the World Trade Center; "Unabomber" Ted Kaczynski; 9/11 conspirator Zacarias Moussaoui; and Richard Reid, the "shoe bomber," reports CNN.

The United States Penitentiary Administrative Maximum Facility, also known as ADX or "supermax," is the most restrictive prison in America.

The daily routine sees prisoners spend about 23 hours a day in solitary confinement in 12-by-7-foot cells with a single 4-inch-wide window and walls thick enough to stifle any attempts at communication. A slot in the door is used to deliver meals and used to speak through for any visits. Some inmates, including convicted terrorists, are placed in a special section where even tighter restrictions are imposed, reports NBC News.

Earlier this month, Tsarnaev filed a motion demanding a new trial, less than two weeks after he was formally sentenced to death over the attacks, the bloodiest on U.S. soil since 9/11.