Harlemensis) and the first bishop of Haarlem was Nicolaas van Nieuwland (born in 1510). He accepted the position on 6 November 1561. In 1569 he was advised to resign by the Duke of Alva, because of his reputation for drinking (Dronken Klaasje). He had a good reason to drown his sorrows, because he feared the Catholic Spanish invaders as much as the native Dutch reformers. The Grote Kerk was initially spared fromiconoclasm, because the city's mayor ordered the closing of the church for several months in 1566. That gave the various groups in Haarlem the time to quietly remove many of the treasures from the church and stash them safely in underground chapels. All symbols and statues linked to the Roman Catholic faith were removed from the cathedral. Since many groups already had their own chapels in the Grote Kerk, this was conducted in an orderly way. However, after the siege of Haarlem was lost, the Spanish army restored Roman Catholic iconography. The guilds had to restore their old altars, at great expense. Since Haarlem was quite poor after the siege, this led to many of the chapels and other Catholic churches being abandoned and used for other purposes. The Bakenesserkerk, where 1500 soldiers were held before being killed by the Spanish after their victory, was used to store turf for fifty years.
Van Nieuwland was succeeded by Godfried van Mierlo, who would be the last bishop in communion with Rome Haarlem would know for 300 years. In 1578 after the Spanish were defeated, the church was attacked on Sacrament day (29 May), this time by soldiers of thePrince of Orange. One of the priests was killed, and many objects in the church were destroyed. This event, called the Haarlemse Noon, forced the bishop to flee the city. Fortunately, many treasures were still safe 500 yards away in the underground Catholic church. The city council confiscated the Sint Bavo Kerk and all of its daughter churches, and later converted them along the tenants of the Evangelical
