oldest dutch city gate the helpoort in maastricht

1229 18th ages alde ancient ancker arch arched archgate architecture attraction building called capital center century city cultural culture defense defenses destination dutch europe exhibition existing famous fortification fortified fortress foundation gate gateway hell helpoort heritage historic holland inner landmark life limburg maastricht medieval middle monument national netherlands object old oldest outside machicolation province provincial scene scenic sight site south still street summer thirteenth today tourism tourist tower towers town travel view visitors wall work works