The Islamic Empire actually got Europe out of the Dark Ages because when the Islamic Empire conquered Spain, they brought many great inventions, innovations,and art work with them such as textiles, which flourished in Europe. Also they brought many new mathematics theories that made Europe build on them, which caused Europe to begin to invent new science and mathematic theories and concepts causing them to begin the Renaissance.
The guy below me is thinking of the Byzantines, who are the Romans, just they are the Eastern Roman Empire who flourished, the Western Roman Empire crashed on itself.