Yucel Incident of 1957 and the Kalkandelen Incident of 1968. Many of these protest were led by Mehmet Gega, a notable Albanian rights activist who was sentenced to ten years in prison. In the 1968 demonstrations, The Tetovar Albanians demanded for the attachment of the Albanian areas of Socialist Republic of Macedonia to Kosovo and their joint reconstitution as a seventh republic of Yugoslavia. The authorities rejected this demand and instead authorised the revision of syllabuses and textbooks in order to curb what it called ‘‘The penetration of Albanian nationalistic, irredentist and counter-revolutionary tendencies through printed textbooks and other literature.’’ In 1974, a new federal constitution was ratified which eased the tension of the local Albanians. The government of Yugoslavia viewed these demonstrations as the first stage in an Albanian plot aimed at eventually separating these areas, and joining them with neighboring Albania. SR Macedonia imposed harder prison sentences than the authorities in Kosovo. Tetovo under Josip Broz Tito's Yugoslavia went through major changes. Many Yugoslav Brutalist styled apartments were built around the city centre of Tetovo as well as concrete roads. New suburbs such as the Hajdućka suburb were formed to help accommodate the rising number of Macedonians moving to the city. Some of the city's historic buildings, such as the Old Mosque, were demolished by the authorities. When troubles in neighbouring Kosovo began in 1981, Tetovo had to be put under control of paramilitary police due to the rioting and show of sympathy with the Kosovar Albanians. The same happened again in 1989. Break up of Yugoslavia When it became obvious in 1990 that Yugoslavia was about to fall, over 2,000 ethnic Albanians marched through Tetovo demanding secession from the Socialist Republic of Macedonia and unity with Albania. Self-determination of an ethnic minority within a state was not a right under the Socialist Republic of Macedonia's constitution, and protesting their lack of representation under the constitution of a new Republic of Macedonia, the Albanians of Macedonia boycotted the referendum on independence from Yugoslavia and were thus excluded from almost any representation in the new government. Tetovo became headquarters of the new Albanian political parties, which were regarded as unconstitutional by the Republic of Macedonia. Tensions worsened, Tetovo, along with the city of Gostivar, took in and sheltered several thousands of Bosnian Muslim refugees from 1992 until the end of the Bosnian war. Prior to the NATO bombing of