▁the ▁largest ▁with ▁a ▁diameter ▁of ▁. ▁The ▁Nob els ▁produced ▁ 6 0 , 0 0 0 ▁po ods ▁of ▁ref ined ▁oil ▁per ▁day . ▁ ▁When ▁Black ▁City ▁began ▁growing ▁beyond ▁its ▁borders , ▁oil ▁industrial ists ▁started ▁to ▁look ▁for ▁new ▁convenient ▁areas ▁to ▁serve ▁their ▁needs . ▁So on ▁a ▁new ▁industrial ▁area ▁to ▁the ▁east ▁of ▁Black ▁City ▁emer ged ▁and ▁became ▁known ▁as ▁White ▁City . ▁By ▁the ▁end ▁of ▁ 1 9 0 2 , ▁up ▁to ▁ 2 0 ▁more ▁large ▁oil ▁ref iner ies ▁and ▁oil - related ▁trade ▁business es ▁were ▁built ▁here ▁such ▁as ▁Mant as he v ▁and ▁Co ., ▁C asp ian – Black ▁Sea ▁Society ▁and ▁Sh ib ay ev ' s ▁Chem ical ▁Plant . ▁Un like ▁Black ▁City , ▁White ▁City ▁accommod ated ▁more ▁modern ▁and ▁better ▁function ing ▁ref iner ies ▁and ▁therefore , ▁the ▁area ▁was ▁not ▁as ▁poll uted . ▁In ▁ 1 8 8 2 – 1 8 8 3 , ▁the ▁Nobel ▁brothers ▁founded ▁an ▁industrial ▁community ▁on ▁the ▁border ▁of ▁Black ▁City ▁and ▁White ▁City ▁called ▁Villa ▁Pet role a . ▁ ▁By ▁ 1 9 0 5 , ▁most ▁oil ▁ref iner ies ▁of ▁B aku ▁were ▁located ▁there . ▁ ▁James ▁D od ds ▁Henry ▁wrote ▁in ▁ 1 9 0 5 ▁that ▁Black ▁City ▁and ▁Bib i - H ey bat ▁were ▁the ▁only ▁" black ▁sp ots " ▁of ▁B aku . ▁B aku ▁was ▁one