The residents of this part of Amsterdam were known as invincible fighters. The proverbial "fight against the beer quay" is derived from this: dedication to a hopeless cause. There are more than a hundred national monuments on Oudezijds Voorburgwal . Some well-known buildings on the OZ Voorburgwal are:   The Oudezijds Achterburgwal is spanned by 8 bridges, all fixed. With the passage heights in the table, one must take into account the fact that the Oudezijds Achterburgwal, like all other canals in the city center, is below the NAP. Notes on the three northern bridges:  The Oudezijds Voorburgwal is depicted on the ace of the standard Dutch deck of cards.