1546 in his seaside palace in the Büyükdere neighbourhood of Istanbul, on the northwestern shores of the Bosphorus. He is buried in the tall mausoleum (türbe) near the ferry port of the district of Beşiktaş on the European side of Istanbul, which was built in 1541 by the famous architect Mimar Sinan, at the site where his fleet used to assemble. His memorial was built in 1944, next to his mausoleum. The Flag (Sanjak) of Hayreddin Barbarossa The Arabic calligraphy at the top of the standard reads, "" (nasrun mina'llāhi wa fatḥhun qarībun wa bashshiri'l-mu’minīna yā muḥammad), translated as "Victory from Allah and an eminent conquest; and give good tidings to the believers, O Muhammad." The text comes from verse 61:13 of the Quran, with the addition of "O Muhammad", since the last part of the verse addresses the Islamic prophet, Muhammad. Within the four crescents are the names, from right to left, beginning at the top right, of the first four caliphs – Abu Bakr, Umar, Uthman, and Ali – whose rule of the Islamic state after Muhammad is referred to as the Rashidun Caliphate. The two-bladed sword represents Dhu'l-Fiqar, a famous sword in Islamic history, belonging first to Muhammad and then Ali. To the left of the sword's hilt is a small hand. Between the two blades of the sword is a six-pointed star. The star may be confused with the Star of David, a Jewish symbol. However, in medieval times, this star was a popular Islamic symbol known as the Seal of Solomon and was widely used by the Beyliks of Anatolia. The seal was later used by the Ottomans in their mosque decorations, coins and the personal flags of the pashas, including Hayreddin Barbarossa. One of the Turkish beyliks known to use the seal on its flag was the Jandarids. According to the Catalan Atlas of 1375 by A. Cresques, the flag of the Karamanids, another Anatolian beylik, consisted of a blue six-edged star. Legacy Hayreddin Barbarossa established the Ottoman supremacy in the Mediterranean, which lasted until the Battle of Lepanto in 1571. However, even after their defeat in Lepanto, the Ottomans quickly rebuilt their fleet, gained Cyprus and other territories in Morea and Dalmatia from the Republic of Venice between 1571 and 1573, and reconquered Tunisia from Spain in 1574. However, during these centuries of great seamen such as Kemal Reis before him; his brother