I don't actually know this. But, I think that it was Lincoln. Then the Amenstapation proclamation was created. BTW, I probably spelt Amenstapation wrong.
shorter hours, higher wages, and better working conditions.
The answer is concrete.
<span>The Romans' ingenious use of concrete was
instrumental in the construction of the great cathedrals of Europe 1,000 years
later. Vaulting of concrete completed the building of the great cathedrals and amphitheater
of the Romans. It also made the Pantheon dome and the Palestrina’s Sanctuary of
Fortuna Primigenia. </span>
The answer in here is the system of numerals. Gupta mathematicians developed the concept of zero and also<span> developed the </span>decimal system<span>. They also created a number writing system.</span><span>This system became known as </span>Arabic Numerals<span>, but is really a Gupta achievement.</span>
