Alexander from the grave

I conquered the five oceans,
And settled my empire;
in the seven continents.
Jewels overflooded my treasury,
And I banished all treachery.
I embellished my throne with gems,
And I entertained  myself.
If I am alive today,
I may conquer Cyladia too.
And be the Emperor of world.
When I was alive,
I heard many cries;
But defeated my woes.
I beheaded many scholars,
and made philosophers to exile.
I was a great emperor,
But defeated by mosquito.
Now I lay here in this soil
With open hands.
And you can see,
Nothing is left in my hands.