This Psalm was written at a time of great destruction in Jerusalem. It describes the work of God's enemies (4-8). They have burned the sanctuary and destroyed every place of worship. The Psalmist makes a plea for deliverance and appeals to God's covenant with Israel (1-3, 20, 22).
The strongest plea we can make in prayer is to pray the promises of God. These are prayers that he is sure to answer.
The physical conditions in Jerusalem then are reflected in the spiritual conditions of many churches today. This should grieve our hearts and drive us to our knees.