جان آدامز (از ماساچوست) به جیمز سالیوانفیلادلفیا، ۲۶ ماه مه، ۱۷۷۶.“از لحاظ تئوری مسلما تنها پایگاه اخلاقی...
روز: شهریور ۲۱, ۱۴۰۳
رصدخانه مراغه را بیگمان میتوان مهمترین مرکز علمی ایرانیان در دوره ایلخانی و پس از حمله مغولها...
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