At the time of the Spanish conquest, the Inca Empire (Tawantinsuyu in Quechua, the "Land of the Four Quarters") was the largest and wealthiest empire in the world, and this was depicted in their art. Most Inca sculpture was melted down by the invading Spanish, so most of what remains today is in the form of architecture, textiles, and ceramics. The Inca valued gold among all other metals, and equated it with the sun god Inti. Some Inca buildings in the capital of Cusco were literally covered in gold, and most contained many gold and silver sculptures. Most Inca art, however, was abstract in nature. Inca ceramics were primarily large vessels covered in geometric designs. Inca tunics and textiles contained similar motifs, often checkerboard patterns reserved for the Inca elite and the Inca army. Today, due to the unpopularity of abstract art and the lack of Inca gold and silver sculpture, the Inca are best known for the architecture – specifically the complex of Machu Picchu just northwest of Cusco. Inca architecture makes use of large stone blocks, each one cut specifically to fit around the other blocks in a wall. These stones were cut with such precision that the Incas did not need to make use of mortar to hold their buildings together. Even without mortar, Inca buildings still stand today; they form many of the foundations for even modern-day buildings in Cusco and the surrounding area. The Incas produced thousand of large stone structures, among them forts, temples, and palaces, even though the Inca Empire lasted for only 95 years.