Africa's longest serving presidents: An anti-government protester throws a tear gas canister at riot police in Ouagadougou, capital of Burkina Faso, Thursday, Oct. 30, 2014. Thousands of protesters marched on Burkina Faso's presidential palace after burning the parliament building and ransacking state television offices on Thursday, forcing President Blaise Compaore to scrap a plan to extend his 27-year rule. Emergency services said at least three protesters were shot dead and several others wounded by security forces when the crowd tried to storm the home of Compaore's brother. Security forces also fired live rounds and tear gas at protesters near the presidency in the Ouaga 2000 neighborhood. Reuters/Joe Penney

One of Africa's longest-ruling dictators, Blaise Compaoré of Burkina Faso, appeared to be on his way out on Thursday after protesters burned the parliament building and violently clashed with police in the capital, Ouagadougou. The army chief announced that a transitional government would be in place for a year, but did not say who would lead it.

The possible ouster of Compaoré has people wondering if this is the start of an African Spring, like the Arab Spring of 2011. Africa has its fair share of entrenched rulers; even with 27 years in power, Compaoré does not even crack the top five longest-serving leaders. He is in fact the sixth longest serving non-royal ruler in Africa.

Here are the top five:

1. Paul Biya, Cameroon: Prime minister, then president, for 39 years, 122 days

Paul Biya
The five longest-serving African presidents: Cameroon's President Paul Biya waves as he leaves following a meeting at the Elysee Palace in Paris, Jan. 30, 2013. Reuters/Philippe Wojazer

The 81-year-old from the nation's Christian south has been in power since 1975, when he became prime minister, although he didn't really take full control over the country until he consolidated power in 1983. Like most other dictators, he's won all but one election held in the country since by landslides. He survived a military coup attempt in 1984 and gave in to multiparty elections in 1992, the only year his power was actually threatened. Opponents allege massive voter fraud. While not as violent as some of the other dictators Africa has seen, he's certainly quelled his fair share of protests and opposition movements.

2. Teodoro Obiang Nguema Mbasogo, Equatorial Guinea: President for 35 years, 88 days

Teodoro Obiang
Africa's longest serving presidents: Teodoro Obiang Nguema Mbasogo, president of the Republic of Equatorial Guinea, addresses the 69th United Nations General Assembly, Sept. 24, 2014. Reuters/Lucas Jackson

He's been president for longer than any other African leader. Like Cameroon, Equatorial Guinea has a multiparty system, but Obiang always wins landslide victories, as when he won the presidency with 97 percent of the vote in 2002. He's accused of filling his personal bank accounts with state money and spending it on luxury vehicles, foreign real estate and expensive trips across the globe. State media call him a national "god" and promotes a cult of personality around him. The tiny former Spanish colony country is the 13th most corrupt in the world, according to Transparency International. His son, Teodoro Nguema Obiang Mangue, is vice president and minister of agriculture. He's amassed his own wealth. His vice presidential post would allow him to become president after his father leaves office or dies.

3. Jose Eduardo dos Santos, Angola: President for 35 years, 88 days

Jose Eduardo dos Santos
Africa's longest serving presidents: Angolan President Jose Eduardo dos Santos addresses supporters during his MPLA party's last rally for the parliamentary elections in Camama, outside the capital Luanda, Aug. 29, 2012. Reuters/Siphiwe Sibeko

Santos has been the leader of the ruling People's Movement for the Liberation of Angola since the country gained independence from Portugal in 1975. He is reportedly the wealthiest president on the continent, worth around $20 billion, which he gained through giving himself stakes in state-owned companies and transferring public funds to his personal bank accounts. Although seen by some as not quite a dictator, he can be hardly called democratic. His country is ranked the 25th most corrupt in the world by Transparency International.

His daughter, Isabel dos Santos, is the richest woman in Africa and the continent's first female billionaire. The 41-year-old investor has a net worth of around $3.5 billion and stakes in most of Angola's largest companies and many in Portugal, Angola's former colonial ruler, as well. She has holdings in telecoms, oil and media businesses. Her father has transferred a number of business holdings to her name.

4. Robert Mugabe, Zimbabwe: Prime Minister, then president, for 34 years, 195 days

Robert Mugabe
Africa's longest serving presidents: Zimbabwe President Robert Mugabe addresses supporters outside his ZANU PF party headquarters in Harare, Oct. 30, 2014. Zimbabwe's state media accused Vice President Joice Mujuru of extortion and abuse of office on Thursday in what observers say is a stepped-up campaign to discredit her in a battle to succeed the aged Mugabe. Reuters/Philimon Bulawayo

The 90-year-old with a toothbrush moustache might be Africa's most notorious dictator. His rule began in 1980 after the guerrilla movement he led, ZANU-PF, managed to upend white-minority rule in what was then called Rhodesia. He soon descended into authoritarianism. The Zimbabwean economy has performed disastrously since he came to power. He's seized properties and violently cracked down on the opposition with torture and unlawful arrests. The U.S. and European Union have placed travel bans on him. Zimbabwe is the 18th most corrupt country in the world, according to Transparency International.

He made his one viable opponent, Morgan Tsvangirai, his prime minister for four years in 2009 but has since consolidated power again. There's a big question of who will succeed Mugabe, but Zimbabwe's next leader is likely to come from within the circle of Mugabe's government. Many hope it will be a more democratically minded leader like Vice President Joice Mujuru.

5. Yoweri Museveni, Uganda: President for 28 years, 274 days

Yoweri Museveni
Africa's longest serving presidents: Uganda's President Yoweri Museveni arrives to attend the Africa Union Peace and Security Council Summit on Terrorism at the Kenyatta International Convention Centre in Nairobi, Kenya, Sept. 2, 2014. African leaders proposed on Tuesday creating a special fund to combat Islamist militant groups growing in strength from Kenya to Nigeria. Reuters/Noor Khamis

Museveni was involved in the 1979 toppling of ruthless dictator Idi Amin and was a prominent figure in the civil war that followed. His National Resistance Movement, the military wing of the National Resistance Party, came out victorious and he's ruled the country ever since. He helped kickstart economic growth and stability following the civil war, but his party's military force grew increasingly violent. The yearslong fight against the Lord's Resistance Army rebels has both bolstered his power in the country and helped keep Uganda from flourishing.

He's played a major role in regional conflicts with support for armed groups in neighboring countries, particularly in the Democratic Republic of the Congo. His relatively strong economic record and close adherence to IMF and World Bank guidelines have kept his international reputation largely favorable.

He's won landslide victories since elections began in 1996, which have all been marred by massive fraud and voter intimidation, and he has pushed an anti-LGBT agenda, making Uganda one of the worst countries in the world to be gay. That's earned him criticism from the U.S., a cautious partner of Uganda. Transparency International ranks Uganda the 33rd most corrupt country in the world.