Nojpetén (also spelled Noh Petén, and also known as Tayasal) was the capital city of the Itza Maya kingdom of Petén Itzá. It is located on an island in Lake Petén Itzá in the modern department of Petén in northern Guatemala. The island is now occupied by the modern town of Flores, the capital of the Petén department, and has had uninterrupted occupation since pre-Columbian times. Nojpetén had defensive walls built upon the low ground of the island, which may have been hastily constructed by the Itza at a time when they felt threatened either by the encroaching Spanish or by other Maya groups. Writing many years after his journey across Petén, conquistador Bernal Díaz del Castillo called the city Tayasal; this appears to have been a Hispanicisation of the Itza language ta itza ("at the place of the Itza"). The Itza king Kan Ek' referred to the city by the name Nojpetén when he spoke to the Spanish in 1698. Nojpetén, from the Itza noj peten, means "great island". Earliest archaeological traces on the island date back to 900–600 BC, with a major expansion of the settlement occurring around 250–400 AD. Ethnohistoric documents claim the founding of Nojpetén in the mid-15th century AD. These relate that Nojpetén was founded when the Itza fled south around 1441–1446, after they were deposed by the Xiu Maya at Mayapan. When they settled on the island, they divided their new capital into four-quarters based upon lineage groups. right Nojpetén was closely packed with buildings that included temples, palaces and thatched houses. Approximately 2,000 people are estimated to have lived in the city, in an estimated 200 houses. The modern street plan of Flores is likely to have been inherited from pre-Columbian Nojpetén, with a quadripartite division by principal streets running north–south and east–west that intersect at the summit, occupied by the modern plaza and catholic church. In 1698 Spanish accounts describe the city as having had twenty-one temples, the largest of these (which the Spanish called a castillo) had a square base measuring on each side.