Armenian Genocide Centenary march in Yerevan, April 24. Photo by Joey Ayoub.

Millions of people marched on April 24 to commemorate the Armenian Genocide Centennial. The day marks the date when Ottoman authorities began rounding up around 250 Armenian intellectuals and community leaders in Constantinople, paving the way for the Armenian Genocide in which an estimated 1-1.5 million Armenian citizens of the Ottoman Empire were systematically exterminated between 1915 and 1918.

In Yerevan, hundreds of thousands of Armenians and foreigners took part in a massive march from Republic Square to Tsitsernakaberd, the Armenian Genocide Memorial. This Global Voices author participated and took photographs.

Armenian Genocide Centenary march in Yerevan, April 24. Photo by Joey Ayoub.

Armenians and supporters arrive at Tsitsernakaberd, April 24. Photo taken by Joey Ayoub

The eternal flame is seen as a man lays a flower inside Tsitsernakaberd, April 24. Photo Taken by Joey Ayoub.

Armenians and supporters arrive laying flowers inside Tsitsernakaberd, April 24. Photo Taken by Joey Ayoub.

In Los Angeles, home of the largest Armenian community outside of Armenia, over 100,000 Armenians and supporters marched towards the Turkish consulate.

Many marchers have reached Turkish consulate on Wilshire Blvd. @Sky5Tim is overhead. Watch: http://t.co/RS504NKVau pic.twitter.com/r084G0Xnig

— KTLA (@KTLA) April 24, 2015

An ariel view of #ArmenianGenocide march in Los Angeles, approx. 50k in attendance #MarchForJustice pic.twitter.com/xTaDcl31Eo via @Araksya

— reported.ly (@reportedly) April 24, 2015

In Lebanon, an estimated 30-40,000 marched. Many Lebanese have spent the last few days celebrating their Armenian heritage.

Yesterday's march in Beirut to mark the centennial of the #ArmenianGenocide. pic.twitter.com/uSoZxdDEuX

— Mahmoud (@MahmoudRamsey) April 25, 2015

Lebanese Armenians and supporters marched on April 24. Photo by Paul Gorra.

In Istanbul, Turks, Kurds, Greeks and Assyrians describe their fears that nationalists would spoil their rallies. The following story was shared by the Armenian Diaspora Project on Facebook.

The march in Istanbul on April 24. Photo shared by The Armenian Diaspora Project.

The caption reads:

Yesterday was an indescribable day. My biggest fear going into the commemoration of the Armenian Genocide in Istanbul was that Erdogan, with elections approaching and a need to appeal to the MHP/nationalist voters, would see our presence on Istiklal Cd as a threat and that the police would then melt away, allowing the nationalist protestors to break through their lines and attack us.

As we sat facing towards Taxim Square, we could hear the shouts from the nationalists at our backs every time the speakers would cut out. Chillingly it seemed to get louder and louder, as if they were edging nearer and nearer. Then – as the sounds of Sareri Hovin Mernem faded- we heard a loud cheer from much closer, and then chants growing louder and louder, a sound I had heard countless times in my years of covering protests; the sound of protestors breaking through police lines.

As we stood up to face what was coming, we saw them. Not angry nationalists waving the red flags of the Vatan Party, but thousands of Turks, Kurds, Greeks, and Assyrians, bearing signs reading “հո՛ս էնք” (We are here), bearing the pictures of Hrant Dink, Gomidas, Sevag Balikci, Taniel Varujan and many others, the streets echoing with their chants of solidarity.

A friend ran through the stunned crowd, arms wide open shouting “They are here with us! They have filled the street!”

So thank you. Thank you Turks, Kurds, Assyrians for standing with us. Thank you Turkish human rights groups for organizing the commemoration at Hydarpasa. Thank you Istanbul Armenians. Thank Osman Kavala. Thank you Sarah Leah Whitson, Nancy Kricorian, Heghnar Watenpaugh, and everyone else at Project 2015.

There is no place else I would have rather been this week.

In Diyarbakir, Turkey, home to a large Kurdish population, people marched on April 24:

People in Amed (Diyarbakir) march to remember the #ArmenianGenocide/Seyfo. pic.twitter.com/3G6UeXmm1z

— Lawên (@Lawwwen) April 24, 2015

Paris and Rome saw their most famous landmarks turn their lights out to commemorate the Armenian Genocide:

In Paris, the Eiffel Tower goes dark to commemorate the #ArmenianGenocide 100yrs later. pic.twitter.com/fZ4yHbgSNm via @armembfrance

— reported.ly (@reportedly) April 24, 2015

“The eternal city- #Rome, the Colosseum goes dark in memory of #ArmenianGenocide victims” pic.twitter.com/DXX3GWeJib via @TMkrtchyan

— reported.ly (@reportedly) April 24, 2015

For more photos from around the world, view this coverage by RT.