And Pharaoh said: O chiefs! I know not that ye have a god other than me, so kindle for me (a fire), O Haman, to bake the mud; and set up for me a lofty tower in order that I may survey the god of Moses; and lo! I deem him of the liars.
I understand his speech to his minister Haman
to be sarcastic. But some Commentators have taken it
very seriously and imagined that he actually thought of
reaching the heavens by budding lofty towers
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (surah 28 verse 38). Quran Arabic with English Translation & Commentary (Tafsir) by Abdullah Yusuf Ali, Free Download (quran4u.com)