This master thesis is about the Shia in Saudi Arabia. Their prosecutions started with the establishment of the first Saudi kingdom and the ideology of Muhammad ibn Abd al-Wahhab, who helped the former ruler to expand his kingdom. With Ibn Abd al-Wahhab a new religious orientation developed, where the shiitic religion was considered to be the enemy. Wahhabis charged the practices of Shiites as sorcery, blasphemous and polytheistic. So they started to persecute them, destroyed their mosques and illegalized their religious habits.Today, in the third Saudi kingdom, nearly 300 years later, the situation of the Saudi Shia is similar. Even the murder has stopped, they are still suffering from discrimination and social, political or religious marginalization. In the second part of the 20th century, the Saudi Shiites started to demand equal rights, political reforms and equal treatment. They started to organize themselves in opposition parties, began to protest and with the Iranian Revolution under the Shiite Khomaini in 1979 the Saudi Shia got more confidence. A hopeful sign was the establishment of the first National Dialogue in 2003. Religious scholars, even shiitics, reformer, politicians and other experts were invited for a common dialogue. Seven other meetings followed. Although the first enthusiasm was dampened by some setbacks, the social, religious and political situation improved over the last few years. To this day the conditions advanced but there is still a long way to an equal treatment between the different Islamic confessions.