▁r ounds ▁dated ▁ 2 1 – 2 2 ▁April ▁and ▁ 1 2 – 1 3 ▁May , ▁respectively , ▁were ▁also ▁post pon ed ▁due ▁to ▁the ▁virus . ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ ▁Argentina ▁F 4 ▁Championship ▁Category : F 4 ▁Argentina ▁Championship ▁seasons ▁Category : 2 0 2 0 ▁in ▁Formula ▁racing <0x0A> </s> ▁The ▁Mer ch ants ' ▁National ▁Bank ▁( 1 9 1 4 ) ▁building ▁is ▁a ▁historic ▁commercial ▁building ▁located ▁at ▁ 8 3 3 ▁Four th ▁Avenue ▁in ▁Gr inn ell , ▁Iowa . ▁It ▁is ▁one ▁of ▁a ▁series ▁of ▁small ▁banks ▁designed ▁by ▁Louis ▁S ull ivan ▁in ▁the ▁Mid west ▁between ▁ 1 9 0 9 ▁and ▁ 1 9 1 9 . ▁ ▁All ▁of ▁the ▁banks ▁are ▁built ▁of ▁brick ▁and ▁for ▁this ▁structure ▁he ▁employed ▁various ▁sh ades ▁of ▁brick , ▁r anging ▁in ▁color ▁from ▁blue - black ▁to ▁golden ▁brown , ▁giving ▁it ▁an ▁overall ▁re dd ish ▁brown ▁appearance . ▁ ▁It ▁was ▁declared ▁a ▁National ▁Historic ▁Land mark ▁in ▁ 1 9 7 6 ▁for ▁its ▁architecture . ▁ ▁In ▁ 1 9 9 1 ▁it ▁was ▁listed ▁as ▁a ▁contrib uting ▁property ▁in ▁the ▁Gr inn ell ▁Historic ▁Com mer cial ▁District . ▁ ▁Description ▁and ▁history ▁Mer ch ants ' ▁National ▁Bank ▁was ▁built ▁in ▁ 1 9 1 4 ▁and ▁had ▁its ▁grand ▁opening ▁on ▁January ▁the ▁first , ▁in ▁ 1 9 1 5 , ▁along ▁with ▁the ▁Pur